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Lab 1 osmosis and diffusion essay 1992

AP Biology Lab 1: Diffusion and Osmosis - YouTube

"hydrogen-ion dependence of the antidiuretic action of vasopressin, oxytocin and deaminooxytocin". x 10 -4 10 average cumulative water loss (ml h 2 o/cm 2 ) time (minutes) average cumulative water loss by the plants in group i. they are, in general, healthy, but exhibit a defect in the ability to concentrate solutes in the urine and to conserve water when deprived of drinking water.[10][11] in the mid-1960s an alternative hypothesis (the "partition–diffusion model") sought to establish that the water molecules partitioned between the water phase and the lipid phase and then diffused through the membrane, crossing it until the next interphase where they left the lipid and returned to an aqueous phase. 11: animal behavior
  • hypothesis development
    • poor: i think pillbugs will move toward the wet side of a choice chamber. it is the mechanism by which the aquaporin is able to selectively bind water molecules (hence allowing them through) and prevent other molecules from entering. others suggested that hydrogen bonds between asparagine amino acids in the two npa regions and the oxygen in the water cause the rotation. discuss how three of the following factors might affect the physiology and/or behavior of the bombats to result in this pattern of activity. 12: dissolved oxygen
      • concepts
        • dissolved o 2
        • primary productivity
          • measured in 3 ways:
            • amount of co 2 used
            • rate of sugar (biomass) formation
            • rate of o 2 production
        • net productivity vs. aromatic/arginine or "ar/r" selectivity filter is a cluster of amino acids that help bind to water molecules and exclude other molecules that may try to enter the pore. germinating seeds at 22°c and at 10°c
        • 2. "water permeation across biological membranes: mechanism and dynamics of aquaporin-1 and glpf". for example, the aquaporin 3 channel has a pore width of 8–10 ångströms and allows the passage of hydrophilic molecules ranging between 150 and 200 da. these are also essential for the water transport system in plants[27] and tolerance to drought and salt stresses.[26][29] the amino and carboxyl halves resemble each other, apparently repeating a pattern of nucleotides. 7: genetics (fly lab)
          • essay 2003 (part 2)
          • the formula for chi-squared is:
          degrees of freedom (df) probability (p) 11. purpose of this lab was to investigate the phenomenon of genetic drift and its significance to allele variation.
          • a statement of the specific hypothesis that you are testing
          • a description of your experimental design (be sure to include a description of what data you would collect and how you would present and analyze the data using a graph.[21] the pioneering research and subsequent discovery of water channels by agre and his colleagues won agre the nobel prize in chemistry in 2003. calculate, showing all work, the frequencies of the alleles and frequencies of the genotypes in a population of 100,000 rabbits of which 25,000 are white and 75,000 are agouti. some researchers identified an electrostatic field generated by the two aquaporin half-helices hb and he as the reason. diagram of the 2d structure of aquaporin 1 (aqp1) depicting the six transmembrane alpha-helices and the five interhelical loop regions a-e. it was present in structures such as kidney tubules and red blood cells, and related to proteins of diverse origins, such as in fruit fly brain, bacteria, the lens of the eye, and plant tissue. in your answer, include a discussion of the relationship between the structure and the function of this enzyme, as well as a discussion of ho structure and function of enzymes are affected by temperature and ph.
          • essay 2004
          • meiosis reduces chromosome number and rearranges genetic information. in your answer, include a discussion of the relationship between the structure and the function of this enzyme, as well as a discussion of ho structure and function of enzymes are affected by temperature and ph.

            1992 diffusion osmosis lab essay answers

            assume that the digestion occurred under appropriate conditions and went to completion. 3: mitosis & meiosis
            • concepts
              • mitosis
                • interphase
                • prophase
                • metaphase
                • anaphase
                • telophase
              • meiosis
                • meiosis 1
                  • separate homologous pairs
                • meiosis 2
                  • separate sister chromatids
              • crossing over
                • in prophase 1
            i p m a t.
          • sample 1 — chloroplast suspension + dpip
          • sample 2 — chloroplast suspension surrounded by foil wrap to provide a dark environment + dpip
          • sample 3 — chloroplast suspension that has been boiled + dpip
          • data are given in the table on the next page. describe a controlled experiment that could be performed to test this hypothesis, and the results you would expect. 1: diffusion & osmosis
            • conclusions
              • water moves from high concentration of water ( hypotonic =low solute) to low concentration of water ( hypertonic =high solute)
              • solute concentration & size of molecule affect movement through semi-permeable membrane
            .
            • a statement of the specific hypothesis that you are testing
            • a description of your experimental design (be sure to include a description of what data you would collect and how you would present and analyze the data using a graph. some of them, known as aquaglyceroporins, also transport other small uncharged dissolved molecules including ammonia, co2, glycerol, and urea.^ marples, d; christensen, s; christensen, ei; ottosen, p d; nielsen, s (1995-04-01). the phosphorylation of an aquaporin has also been linked to the opening and closing of petals in response to temperature.[25] for many years, scientists assumed that water leaked through the cell membrane, and some water does. 10: circulatory physiology
              • essay 2002
              • in mammals, heart rate during periods of exercise is linked to the intensity of exercise. 11: animal behavior
                • essay 1997
                • a scientist working with bursatella leachii , a sea slug that lives in an intertidal habitat in the coastal waters of puerto rico, gathered the following information about the distribution of the sea slugs within a ten-meter square plot over a 10-day period. have been also discovered in the fungi- saccharomyces cerevisiae (yeast), dictyostelium, candida and ustilago and the protozoans- trypanosoma and plasmodium. gas volume measurements were corrected for changes in temperature and pressure. 12: dissolved oxygen
                  • description
                    • measure primary productivity by measuring o 2 production
                    • factors that affect amount of dissolved o 2
                      • temperature
                        • as  water temperature, its ability to hold o 2 decreases
                      • photosynthetic activity
                        • in bright light, aquatic plants produce more o 2
                      • decomposition activity
                        • as organic matter decays, microbial respiration consumes o 2
                      • mixing & turbulence
                        • wave action, waterfalls & rapids aerate h 2 o &  o 2
                      • salinity
                        • as water becomes more salty, its ability to hold o 2 decreases
                  ., trumbo(9) examined information sufficiency, motivation, and self-efficacy as antecedents.
                • explain how biological and physical processes are responsible for the difference between each of your predictions and the data for group i. how do (1) temperature and (2) ph affect the activity of this enzyme? construct and label a graph showing the results for the three samples. explain how the reduction and rearrangement are accomplished in meiosis. within the various selection of aquaporin isoforms in plants, there are also unique patterns of cell- and tissue-specific expression. % error for population distribution 1 so it was off by quite a bit. by using this site, you agree to the terms of use and privacy policy. recessive
                • p, f1, f2 generations
                • sex-linked
                • monohybrid cross
                • dihybrid cross
                • test cross
                • chi square
              . 10: circulatory physiology
              • description
                • study factors that affect heart rate
                  • body position
                  • level of activity
                • determine whether an organism is an endotherm or an ectotherm by measuring change in pulse rate as temperature changes
                  • daphnia
              . 6: molecular biology
              • essay 2002
              • the human genome illustrates both continuity and change.

                AP Biology Lab Review | Meiosis | Biology

                3: mitosis & meiosis
                • conclusions
                  • mitosis
                    • cell division
                      • growth, repair
                      • making clones
                    • longest phase = interphase
                    • each subsequent phase is shorter in duration
                  • meiosis
                    • reduction division
                      • making gametes
                      • increasing variation
                    • crossing over in prophase 1
                . are animals with backbones, and it is known that animals with backbones are not only the most complex and complicated groups of animals, but also really highly devolved.^ agre p, preston gm, smith bl, jung js, raina s, moon c, guggino wb, nielsen s (1 october 1993). indicate the conditions under which allele frequencies (p and q) remain constant from one generation to the next. there are three routes for water to flow in these tissues, known as the apoplastic, symplastic and transcellular pathways.^ gravelle s, joly l, detcheverry f, ybert c, cottin-bizonne c, bocquet l (2013). silencing of plant aquaporins has been linked to decreased hydraulic conductance and photosynthesis of the leaf. average distance between individuals 8am 4am 12 mid time of day. 5: cellular respiration
                • essay 1990
                • the results below are measurements of cumulative oxygen consumption by germinating and dry seeds. "the structure, function and regulation of the nodulin 26-like intrinsic protein family of plant aquaglyceroporins". secure the lid with tape and label the petri dish.[32] more recent studies question this interpretation and emphasize an electrostatic barrier as the reason for proton blockage. choose one of the variables that you identified and design a controlled experiment to test your hypothetical explanation. 11: animal behavior
                  • experimental design
                  s ample size. describe a controlled experiment that could be performed to test this hypothesis, and the results you would expect. uses cookies to improve functionality and performance, and to provide you with relevant advertising. after realizing the error, the assistant randomly labeled the flasks containing these four unknown solutions as flask a, flask b, flask c, and flask d. addition to the maintenance of normal cytosolic osmolarity, aquaporins can play a major role in extension growth by allowing an influx of water into expanding cells - a process necessary to sustain plant development.[19] in 1999, together with other research teams, agre reported the first high-resolution images of the three-dimensional structure of an aquaporin, namely, aquaporin-1. 10: circulatory physiology
                  • concepts
                    • thermoregulation
                    • endotherm
                    • ectotherm
                    • q 10
                      • measures increase in metabolic activity resulting from increase in body temperature
                      • daphnia can adjust their temperature to the environment, as temperature in environment increases, their body temperature also increases which increases their heart rate
                  .
                  • the use of a bacterial plasmid to clone and sequence a human gene
                  • polymerase chain reaction (pcr)
                  • restriction fragment polymorphism (rflp analysis)
                • all humans are nearly identical genetically in coding sequences and have many proteins that are identical in structure and function.^ sade, n; shatil-cohen, a; attia, z; maurel, c; boursiac, y; kelly, g; granot, d; yaaran, a; lerner, s (2014-11-01)..) set up a simple distillation apparatus (figure above, left) using a 50 ml round bottom flask for the distillation flask and keep the receiving flask (25ml) in an ice. if the homozygous dominant condition were to become lethal, what would happen to the allelic and genotypic frequencies in the rabbit population after two generations?
                • on the axes provided below, indicate results you expect for both the control and the experimental groups for the controlled experiment you described in part b. the graph depicts the activity cycle over a 48-hour period for a fictional group of mammals called pointy-eared bombats, found on an isolated island in the temperate zone.

AP: LAB-RELATED AP EXAM ESSAYS LAB 1. OSMOSIS AND

Cell-to-Cell Communication - AP Central

^ christensen, s; kusano, e; yusufi, a n; murayama, n; dousa, tp (1985-06-01).^ king, landon s; choi, michael; fernandez, pedro c; cartron, jean-pierre; agre, peter (2001-07-19).
    • the use of a bacterial plasmid to clone and sequence a human gene
    • polymerase chain reaction (pcr)
    • restriction fragment polymorphism (rflp analysis)
  • all humans are nearly identical genetically in coding sequences and have many proteins that are identical in structure and function.
  • design an experiment, based on the principles of diffusion and osmosis, that the assistant could use to determine which of the flasks contains each of the four unknown solutions. small number of people have been identified with severe or total deficiency in aquaporin-1. each sample was placed individually in a spectrophotometer and the percent transmittance was recorded. defects involving aquaporin genes have been associated with several human diseases including nephrogenic diabetes insipidus and neuromyelitis optica.. list two acid-fast organisms and the respective diseases they cause. chemicals splash into your eye the eye wash station is used to flood the eye with water for 15 to 30 minutes to wash the chemicals out of your eye." he had been studying the rh blood group antigens and had isolated the rh molecule, but a second molecule, 28 kilodaltons in size (and therefore called 28k) kept appearing. is a handy way to collect and organize the most important slides from a presentation. pips cluster into two subgroups, pip1 and pip2, whilst tips cluster into 5 subgroups, tip1, tip2, tip3, tip4 and tip5. 11: animal behavior
    • concepts
      • innate vs. 8: population genetics
        • concepts
          • hardy-weinberg equilibrium
            • p + q = 1
            • p 2 + 2pq + q 2 = 1
            • required conditions
              • large population
              • random mating
              • no mutations
              • no natural selection
              • no migration
          • gene pool
          • heterozygous advantage
          • genetic drift
            • founder effect
            • bottleneck
        . 1: diffusion & osmosis
        • description
          • dialysis tubing filled with starch-glucose solution in beaker filled with ki solution
          • potato cores in sucrose solutions
          • determining solute concentration of different solutions
        . show all your work and explain the importance of your final answer. "the structural basis of water permeation and proton exclusion in aquaporins".. seal the tip of the syringe using the index of your left hand and hold tightly.
      • better: if pillbugs prefer a moist environment, then when they are randomly placed on both sides of a wet/dry choice chamber and allowed to move about freely for 10 minutes, most will be found on the wet side. the graph depicts the activity cycle over a 48-hour period for a fictional group of mammals called pointy-eared bombats, found on an isolated island in the temperate zone. 7: genetics (fly lab)
        • essay 2003 (part 2)
        • the formula for chi-squared is:
        degrees of freedom (df) probability (p) 11. 12: dissolved oxygen
        • essay 2004b
        • in most aquatic environments, primary production is affected by light available to the community of organisms.
          • essay 2000
          • the effects of ph and temperature were studied for an enzyme-catalyzed reaction.
            • construct and label a graph using the data for group i.
            • describe how the introduction of high levels of nutrients such as nitrates and phosphates into the lake would affect subsequent observations. 12: dissolved oxygen
              • description
                • measure primary productivity by measuring o 2 production
                • factors that affect amount of dissolved o 2
                  • temperature
                    • as  water temperature, its ability to hold o 2 decreases
                  • photosynthetic activity
                    • in bright light, aquatic plants produce more o 2
                  • decomposition activity
                    • as organic matter decays, microbial respiration consumes o 2
                  • mixing & turbulence
                    • wave action, waterfalls & rapids aerate h 2 o &  o 2
                  • salinity
                    • as water becomes more salty, its ability to hold o 2 decreases
              .

              Resume de zadig ou la destinee

              Lab review

              is a handy way to collect important slides you want to go back to later. 10: circulatory physiology
              • conclusions
                • activity increase heart rate
                  • in a fit individual pulse & blood pressure are lower & will return more quickly to resting condition after exercise than in a less fit individual
                • pulse rate changes in an ectotherm as external temperature changes
              . "the role of plasma membrane aquaporins in regulating the bundle sheath-mesophyll continuum and leaf hydraulics". account for the differences in oxygen consumption observed between:
            • 1. "p-(chloromercuri)benzenesulfonate binding by membrane proteins and the inhibition of water transport in human erythrocytes". 10: circulatory physiology
              • conclusions
                • activity increase heart rate
                  • in a fit individual pulse & blood pressure are lower & will return more quickly to resting condition after exercise than in a less fit individual
                • pulse rate changes in an ectotherm as external temperature changes
              . show all your work and explain the importance of your final answer. uses cookies to improve functionality and performance, and to provide you with relevant advertising. the cross between a male wild type fruit fly and a female white eyed fruit fly produced the following offspring
            • the wild-type and white-eyed individuals from the f1 generation were then crossed to produce the following offspring. 12: dissolved oxygen
              • essay 2004b
              • in most aquatic environments, primary production is affected by light available to the community of organisms. assume that the digestion occurred under appropriate conditions and went to completion. describe either parthenogenesis or cloning and compare the genomes of the offspring with those of the parents. using the same set of axes, draw and label three additional lines representing the results that you would predict for groups ii, iii, and iv. "defective urinary concentrating ability due to a complete deficiency of aquaporin-1". the brown-eyed female of the f1 generation resulted from a mutational change.[5] if aquaporin could be manipulated, that could potentially solve medical problems such as fluid retention in heart disease and brain edema after stroke. describe either parthenogenesis or cloning and compare the genomes of the offspring with those of the parents. 7: genetics (fly lab)
                • essay 2003 (part 1)
                • in fruit flies, the phenotype for eye color is determined by a certain locus. 3: mitosis & meiosis
                  • concepts
                    • mitosis
                      • interphase
                      • prophase
                      • metaphase
                      • anaphase
                      • telophase
                    • meiosis
                      • meiosis 1
                        • separate homologous pairs
                      • meiosis 2
                        • separate sister chromatids
                    • crossing over
                      • in prophase 1
                  i p m a t. selectively conduct water molecules in and out of the cell, while preventing the passage of ions and other solutes. they create a distinctive hourglass shape, making the water channel narrow in the middle and wider at each end. 12: dissolved oxygen
                  • conclusions
                    •  temperature =  dissolved o 2
                    •  light =  photosynthesis =  o 2 production
                    • o 2 loss from respiration
                    •  respiration =  dissolved o 2 (consumption of o 2 )
                  .
                  • essay 2000
                  • the effects of ph and temperature were studied for an enzyme-catalyzed reaction. 3: mitosis & meiosis
                    • essay 1987
                    • discuss the process of cell division in animals.^ zhang, r; alper, s l; thorens, b; verkman, a s (1991-11-01).[14][15][16] in 1990, verkman's experiments demonstrated functional expression of water channels, indicating that water channels are effectively proteins.

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                      Bio Lab 9 Conor Essay - 540 Words | Majortests

                      1: diffusion & osmosis
                      • essay 1992
                      • a laboratory assistant prepared solutions of 0. 6: molecular biology
                        • essay 2002
                        • the human genome illustrates both continuity and change. determine the genotypes of the original parents (p generation) and explain your reasoning. include a description of mitosis and cytokinesis, and of the other phases of the cell cycle.
                        • describe how the introduction of high levels of nutrients such as nitrates and phosphates into the lake would affect subsequent observations. 4: photosynthesis
                          • essay 2004 (part 1)
                          • a controlled experiment was conducted to analyze the effects of darkness and boiling on the photosynthetic rate of incubated chloroplast suspensions. e indicates the dominant allele and e indicates the recessive allele. plants were divided into four groups and were exposed to the following conditions. average distance between individuals 8am 4am 12 mid time of day. "ph-dependence of water and solute transport in toad urinary bladder". 6: molecular biology
                            • essay 1995
                            • the diagram below shows a segment of dna with a total length of 4,900 base pairs. 8: population genetics
                              • essay 1989
                              • do the following with reference to the hardy-weinberg model. is the transfer of molecules back and forth across a membrane, osmosis is the act of water diffusion. the first report of protein-mediated water transport through membranes was by gheorghe benga in 1986, prior to agre's first publication on the topic. discuss how electrons are generated in photosynthesis and why the three samples gave different transmittance results. acid-fast organisms are high in myolic acid and the gram stain is not able to work properly because of the high acidity.^ schnermann, jurgen; chou, chung-lin; ma, tonghui; traynor, timothy; knepper, mark a; verkman, as (1998-08-04). while some studies mainly considered the electric field generated by the protein's half-helices hb and he, others emphasized desolvation effects as the proton enters the narrow aquaporin pore. the amino and carboxyl ends face the inside of the cell. osmosis with eggs your students will never forget this memorable and fun course heroap biology essay questions diffusion osmosis lab report example biology osmosis essay image revised diffusion and osmosis lab doc similar to lab diffusion and osmosis write up ap biologyalbert ap biology practice questions scribd best ideas about ap biology on pinterest genetics biology docplayer net cell transport coloring activities osmosis diffusion for high school biologyprocedure modeling diffusion and osmosis water in an iv the ap bio ap bio essaysap biology should include the topics regularly covered in a college scribd. 11: animal behavior
                                • experimental design
                                s ample size.
                                • construct and label a graph using the data for group i. "evidence from oocyte expression that the erythrocyte water channel is distinct from band 3 and the glucose transporter. "defective proximal tubular fluid reabsorption in transgenic aquaporin-1 null mice".
                                • essay 2004
                                • meiosis reduces chromosome number and rearranges genetic information. and even narrower place in the channel is the "ar/r selectivity filter", a cluster of amino acids enabling the aquaporin to selectively let through or block the passage of different molecules.

                                  Smoking health risks essay

                                  Aquaporin - Wikipedia

                                  [9] in most cells, water moves in and out by osmosis through the lipid component of cell membranes. of Bio LabsSlideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 2003 nobel prize in chemistry was awarded jointly to peter agre for the discovery of aquaporins,[3] and roderick mackinnon for his work on the structure and mechanism of potassium channels. are thirteen known types of aquaporins in mammals, and six of these are located in the kidney,[33] but the existence of many more is suspected. 5: cellular respiration
                                  • essay 1990
                                  • the results below are measurements of cumulative oxygen consumption by germinating and dry seeds. (in rabbits the white color is due to a recessive allele, w, and agouti is due to a dominant allele, w. 12: dissolved oxygen
                                    • concepts
                                      • dissolved o 2
                                      • primary productivity
                                        • measured in 3 ways:
                                          • amount of co 2 used
                                          • rate of sugar (biomass) formation
                                          • rate of o 2 production
                                      • net productivity vs. 1: diffusion & osmosis
                                        • conclusions
                                          • water moves from high concentration of water ( hypotonic =low solute) to low concentration of water ( hypertonic =high solute)
                                          • solute concentration & size of molecule affect movement through semi-permeable membrane
                                        . for each of the procedures/techniques you describe, explain how its application contributes to understanding genetics. 9: transpiration
                                        • essay 1991
                                        • a group of students designed an experiment to measure transpiration rates in a particular species of herbaceous plant. explain what a mutation is, and discuss two types of mutations that might have produced the brown-eyed female in the f1 generation.[44] the gating of an aquaporin is carried out by an interaction between a gating mechanism and the aquaporin, which causes a 3d change in the protein so that it blocks the pore and, thus, disallows the flow of water through the pore. 12: dissolved oxygen
                                          • essay 2001
                                          • a biologist measured dissolved oxygen in the top 30 centimeters of a moderately eutrophic (mesotrophic) lake in the temperate zone.^ a b c johansson, i; karlsson, m; johanson, u; larsson, c; kjellbom, p (2000-05-01). calculate the rate of oxygen consumption for the germinating seeds at 22°c, using the time interval between 10 and 20 minutes. 10: circulatory physiology
                                            • concepts
                                              • thermoregulation
                                              • endotherm
                                              • ectotherm
                                              • q 10
                                                • measures increase in metabolic activity resulting from increase in body temperature
                                                • daphnia can adjust their temperature to the environment, as temperature in environment increases, their body temperature also increases which increases their heart rate
                                            . the arrows indicate reaction sites for two restriction enzymes (enzyme x and enzyme y).
                                            • discuss the interactions of the respiratory, circulatory, and nervous systems during exercise. explain what a mutation is, and discuss two types of mutations that might have produced the brown-eyed female in the f1 generation. "the role of aquaporins in cellular and whole plant water balance". determine the genotypes of the original parents (p generation) and explain your reasoning. include a description of mitosis and cytokinesis, and of the other phases of the cell cycle.[51] acquired nephrogenic diabetes insipidus in rats can be caused impaired regulation of aquaporin-2 due to administration of lithium salts, low potassium concentrations in the blood (hypokalemia) and high calcium concentrations in the blood (hypercalcemia). procedure modeling diffusion and osmosis data analysis determine the molar concentration of the potato cores this would be the sucrose molarity in which the mass of the potato core does not change diffusion and osmosis ap biology crash course albert io study com body gridinapbio png view essay diffusion and osmosis essay from biology ap biology at newburgh free academy introduction osmosis is a movement of water across a cell transport quiz osmosis diffusion pinterest quizes and osmosis essay osmosis essay semut ip osmosis in potato cores at dcj nn ru released ap biology essay questions kidakitap com diffusion and carolina jaime period october title all about essay example galle co. 11: animal behavior
                                              • essay 2002
                                              • the activities of organisms change at regular time intervals. 10: circulatory physiology
                                                • essay 2002
                                                • in mammals, heart rate during periods of exercise is linked to the intensity of exercise.

Ap biology essay questions diffusion osmosis

plot the results for the germinating seeds at 22°c and 10°c. part a, students were first required to calculate the allele frequencies for the original population by counting the number of both white and red chips. these are gating by the dephosphorylation of certain serine residues, which has been seen as a response to drought, and the protonation of specific histidine residues in response to flooding. each sample was placed individually in a spectrophotometer and the percent transmittance was recorded. 1: diffusion & osmosis
  • concepts
    • semi-permeable membrane
    • diffusion
    • osmosis
    • solutions
      • hypotonic
      • hypertonic
      • isotonic
    • water potential
. the day was bright and sunny and the wind was calm. x 10 -4 10 average cumulative water loss (ml h 2 o/cm 2 ) time (minutes) average cumulative water loss by the plants in group i. 11: animal behavior
  • hypothesis development
    • poor: i think pillbugs will move toward the wet side of a choice chamber. discuss how three of the following factors might affect the physiology and/or behavior of the bombats to result in this pattern of activity. he also compared and contrasted the model across three groups, which, respectively, had low concern, uncertainty, and high concern about a cancer risk. construct and label a graph showing the results for the three samples.[48][49] mice with targeted deletions in aquaporin-1 also exhibit a deficiency in water conservation due to an inability to concentrate solutes in the kidney medulla by countercurrent multiplication.
    • explain how biological and physical processes are responsible for the difference between each of your predictions and the data for group i. then, using the same set of axes, draw and label an additional line/curve representing the results that you would predict had the day been heavily overcast.
      • discuss the interactions of the respiratory, circulatory, and nervous systems during exercise. 4: photosynthesis
        • concepts
          • photosynthesis
          • photosystem 1
            • nadph
          • chlorophylls & other plant pigments
            • chlorophyll a
            • chlorophyll b
            • xanthophylls
            • carotenoids
          • experimental design
            • control vs.. describe the function of the following pieces of safety equipment and how each might be used: (10 points). 0 light, boiled % transmittance sample 3 dark, unboiled % transmittance sample 2 light, unboiled % transmittance sample 1 time (min). % error for population distribution 2 so it was still off by quite a bit but less than population distribution 1.
            • design a controlled experiment to determine the relationship between intensity of exercise and heart rate. 4: photosynthesis
              • concepts
                • photosynthesis
                • photosystem 1
                  • nadph
                • chlorophylls & other plant pigments
                  • chlorophyll a
                  • chlorophyll b
                  • xanthophylls
                  • carotenoids
                • experimental design
                  • control vs. the ar/r filter is made of two amino acid groups from helices b (hb) and e (he) and two groups from loop e (le1, le2), from the two sides of the npa motif. plot the results for the germinating seeds at 22°c and 10°c. recessive
                  • p, f1, f2 generations
                  • sex-linked
                  • monohybrid cross
                  • dihybrid cross
                  • test cross
                  • chi square
                . account for the differences in oxygen consumption observed between:
              • 1. 0 light, boiled % transmittance sample 3 dark, unboiled % transmittance sample 2 light, unboiled % transmittance sample 1 time (min).

AP Biology Lab 1: Diffusion and Osmosis - YouTube

Writing Scientific Papers

for each of the procedures/techniques you describe, explain how its application contributes to understanding genetics. 9: transpiration
  • essay 1991
  • a group of students designed an experiment to measure transpiration rates in a particular species of herbaceous plant. if you have a good seal it should be hard to pull on the plunger and you can see bubbles coming from the edge of the leaf disks. the arrows indicate reaction sites for two restriction enzymes (enzyme x and enzyme y). choose one of the variables that you identified and design a controlled experiment to test your hypothetical explanation. discuss how electrons are generated in photosynthesis and why the three samples gave different transmittance results. its narrowness weakens the hydrogen bonds between water molecules, enabling the arginines, which carry a positive charge, to interact with the water molecules and to filter out undesirable protons. 4: photosynthesis
    • essay 2004 (part 1)
    • a controlled experiment was conducted to analyze the effects of darkness and boiling on the photosynthetic rate of incubated chloroplast suspensions.
    • group iii: room conditions with increased air movement (fan)
    • group iv: room conditions with additional light
  • the cumulative water loss due to transpiration of water from each plant was measured at 10-minute intervals for 30 minutes. gas volume measurements were corrected for changes in temperature and pressure. post of ap biology essay questions diffusion osmosisthesis statement construction and activity. if the homozygous dominant condition were to become lethal, what would happen to the allelic and genotypic frequencies in the rabbit population after two generations? "expression of mrna coding for kidney and red cell water channels in xenopus oocytes". 11: animal behavior
    • description
      • set up an experiment to study behavior in an organism
        • betta fish agonistic behavior
        • drosophila mating behavior
        • pillbug kinesis
    . [o 2 ] mg/l 4pm 2pm noon 10am 8am 6am hour. 7: genetics (fly lab)
    • essay 2003 (part 1)
    • in fruit flies, the phenotype for eye color is determined by a certain locus. 11: animal behavior
      • essay 1997
      • a scientist working with bursatella leachii , a sea slug that lives in an intertidal habitat in the coastal waters of puerto rico, gathered the following information about the distribution of the sea slugs within a ten-meter square plot over a 10-day period.
        • to calculate allele frequencies , use p + q = 1
        • to calculate genotype frequencies or how many individuals , use, p 2 + 2pq + q 2 = 1
    . 12: dissolved oxygen
    • essay 2001
    • a biologist measured dissolved oxygen in the top 30 centimeters of a moderately eutrophic (mesotrophic) lake in the temperate zone. 10: circulatory physiology
      • description
        • study factors that affect heart rate
          • body position
          • level of activity
        • determine whether an organism is an endotherm or an ectotherm by measuring change in pulse rate as temperature changes
          • daphnia
      . identify and explain the control or controls for this experiment. the day was bright and sunny and the wind was calm. guided by the aquaporin's local electric field, the oxygen in each water molecule faces forwards as it enters, turning around half way along and leaving with the oxygen facing backwards.
    • include in your answer:
      • a description of how you would set up and perform the experiment;
      • the results you would expect from your experiment; and
      • an explanation of those results based on the principles involved. the brown-eyed female of the f1 generation resulted from a mutational change. 12: dissolved oxygen
        • conclusions
          •  temperature =  dissolved o 2
          •  light =  photosynthesis =  o 2 production
          • o 2 loss from respiration
          •  respiration =  dissolved o 2 (consumption of o 2 )
        .

        What to write a coworker leaving

        is a handy way to collect and organize the most important slides from a presentation.
        • dna digested with only enzyme x
        • dna digested with only enzyme y
        • dna digested with enzyme x and enzyme y combined
        • undigested dna
      • explain both of the following:
        • the mechanism of action of restriction enzymes
        • the different results you would expect if a mutation occurred at the recognition site for enzyme y. 1: diffusion & osmosis
          • description
            • dialysis tubing filled with starch-glucose solution in beaker filled with ki solution
            • potato cores in sucrose solutions
            • determining solute concentration of different solutions
          . after realizing the error, the assistant randomly labeled the flasks containing these four unknown solutions as flask a, flask b, flask c, and flask d.
      1 0 55 45 0 f-1 brown-eyed female white-eyed female white-eyed male wild-type female wild-type male 0 24 22 31 23 f-2 brown-eyed female white-eyed female white-eyed male wild-type female wild-type male.[36] specifically, aquaporins are found in the vacuolar membrane, in addition to the plasma membrane of plants; the transcellular pathway involves transport of water across the plasma and vacuolar membrane.[20] further studies using supercomputer simulations identified the pathway of water as it moved through the channel and demonstrated how a pore can allow water to pass without the passage of small solutes.
    • design an experiment, based on the principles of diffusion and osmosis, that the assistant could use to determine which of the flasks contains each of the four unknown solutions. in this experiment we tested three different food items and checked to see how they reacted with h2o2. 11: animal behavior
      • essay 2002
      • the activities of organisms change at regular time intervals.
      • on the axes provided below, indicate results you expect for both the control and the experimental groups for the controlled experiment you described in part b. 11: animal behavior
        • concepts
          • innate vs. "the dynamics and energetics of water permeation and proton exclusion in aquaporins". 8: population genetics
            • concepts
              • hardy-weinberg equilibrium
                • p + q = 1
                • p 2 + 2pq + q 2 = 1
                • required conditions
                  • large population
                  • random mating
                  • no mutations
                  • no natural selection
                  • no migration
              • gene pool
              • heterozygous advantage
              • genetic drift
                • founder effect
                • bottleneck
            . [o 2 ] mg/l 4pm 2pm noon 10am 8am 6am hour. a piece of paper towel and place it in a petri dish. solomon and his co-workers performed pioneering work on water permeability across the cell membrane in the late 1950s.
            • to calculate allele frequencies , use p + q = 1
            • to calculate genotype frequencies or how many individuals , use, p 2 + 2pq + q 2 = 1
        .
      • include in your answer:
        • a description of how you would set up and perform the experiment;
        • the results you would expect from your experiment; and
        • an explanation of those results based on the principles involved. plants were divided into four groups and were exposed to the following conditions. 1: diffusion & osmosis
          • concepts
            • semi-permeable membrane
            • diffusion
            • osmosis
            • solutions
              • hypotonic
              • hypertonic
              • isotonic
            • water potential
          .
        • design a controlled experiment to determine the relationship between intensity of exercise and heart rate. calculate the rate of oxygen consumption for the germinating seeds at 22°c, using the time interval between 10 and 20 minutes. uses cookies to improve functionality and performance, and to provide you with relevant advertising. 6: molecular biology
          • essay 1995
          • the diagram below shows a segment of dna with a total length of 4,900 base pairs. explain how the reduction and rearrangement are accomplished in meiosis.

          • group iii: room conditions with increased air movement (fan)
          • group iv: room conditions with additional light
        • the cumulative water loss due to transpiration of water from each plant was measured at 10-minute intervals for 30 minutes. indicate the conditions under which allele frequencies (p and q) remain constant from one generation to the next. using the same set of axes, draw and label three additional lines representing the results that you would predict for groups ii, iii, and iv.
        • better: if pillbugs prefer a moist environment, then when they are randomly placed on both sides of a wet/dry choice chamber and allowed to move about freely for 10 minutes, most will be found on the wet side. is a handy way to collect important slides you want to go back to later. 1: diffusion & osmosis
          • essay 1992
          • a laboratory assistant prepared solutions of 0.-1 (aqp1) is found in choroid plexus, contributes to production of csf and aqp4 is found on perivascular and ependymal cells.
          • sample 1 — chloroplast suspension + dpip
          • sample 2 — chloroplast suspension surrounded by foil wrap to provide a dark environment + dpip
          • sample 3 — chloroplast suspension that has been boiled + dpip
          • data are given in the table on the next page. "hypokalemia-induced downregulation of aquaporin-2 water channel expression in rat kidney medulla and cortex.
        1 0 55 45 0 f-1 brown-eyed female white-eyed female white-eyed male wild-type female wild-type male 0 24 22 31 23 f-2 brown-eyed female white-eyed female white-eyed male wild-type female wild-type male.[1] the cell membranes of a variety of different bacteria, fungi, animal and plant cells contain aquaporins through which water can flow more rapidly inside the cell than by diffusing through the phospholipid bilayer. calculate, showing all work, the frequencies of the alleles and frequencies of the genotypes in a population of 100,000 rabbits of which 25,000 are white and 75,000 are agouti.
        • dna digested with only enzyme x
        • dna digested with only enzyme y
        • dna digested with enzyme x and enzyme y combined
        • undigested dna
      • explain both of the following:
        • the mechanism of action of restriction enzymes
        • the different results you would expect if a mutation occurred at the recognition site for enzyme y. germinating seeds at 22°c and at 10°c
        • 2. the cross between a male wild type fruit fly and a female white eyed fruit fly produced the following offspring
        • the wild-type and white-eyed individuals from the f1 generation were then crossed to produce the following offspring. they can be reacted with hydrogen peroxide and you see the reaction take place as soon as the item is dropped in the hydrogen peroxide. then, using the same set of axes, draw and label an additional line/curve representing the results that you would predict had the day been heavily overcast. mechanism of facilitated water transport and the probable existence of water pores has attracted researchers since 1957. systematic and heuristic modes, which, in turn,Predicted risk judgment.^ marples, d; frøkiaer, j; dørup, j; knepper, m a; nielsen, s (1996-04-15). how do (1) temperature and (2) ph affect the activity of this enzyme? 11: animal behavior
          • description
            • set up an experiment to study behavior in an organism
              • betta fish agonistic behavior
              • drosophila mating behavior
              • pillbug kinesis
          . (in rabbits the white color is due to a recessive allele, w, and agouti is due to a dominant allele, w. was not until 1992 that the first aquaporin, 'aquaporin-1' (originally known as chip 28), was reported by peter agre, of johns hopkins university. e indicates the dominant allele and e indicates the recessive allele. 3: mitosis & meiosis
          • conclusions
            • mitosis
              • cell division
                • growth, repair
                • making clones
              • longest phase = interphase
              • each subsequent phase is shorter in duration
            • meiosis
              • reduction division
                • making gametes
                • increasing variation
              • crossing over in prophase 1
          .

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