Lab 12 dissolved oxygen essay 2001

AP & Regents Biology

Explain why each of these features is necessary. The arrows indicate reaction sites for two restriction enzymes enzyme X and enzyme Y. X Y 1, Enzyme X 1, 1, a. Explain how the principles of gel electrophoresis allow for the separation of DNA fragments b. Describe the results you would expect from electrophoretic separation of fragments from the following treatments of the DNA segment above. Assume that the digestion occurred under appropriate conditions and went to completion. Undigested DNA c. Explain both of the following: 1. The mechanism of action of restriction enzymes 2. The different results you would expect if a mutation occurred at the recognition site for enzyme Y.

All humans are nearly identical genetically in coding sequences and have many proteins that are identical in structure and function. Nevertheless, each human has a unique DNA fingerprint. Explain this apparent contradiction. E indicates the dominant allele and e indicates the recessive allele.

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The cross between a male wild type fruit-fly and a female white eyed fruit-fly produced the following offspring Wild-Type Male Wild-Type Female White-eyed Male White-Eyed Female Brown-Eyed Female 0 45 55 0 1 F1 The wild-type and white-eyed individuals from the F1 generation were then crossed to produce the following offspring. Determine the genotypes of the original parents P generation and explain your reasoning.

You may use Punnett squares to enhance your description, but the results from the Punnett squares must be discussed in your answer. Use a Chi-squared test on the F2 generation data to analyze your prediction of the parental genotypes. Show all your work and explain the importance of your final answer. The brown-eyed female of the F1 generation resulted from a mutational change. Explain what a mutation is, and discuss two types of mutations that might have produced the brown-eyed female in the F1 generation. Probability p.

Presentation on theme: "Lab 12: Dissolved Oxygen Mr. West Bell Ringer:"— Presentation transcript:

AP Biology Lab Dissolved Oxygen ESSAY B In most aquatic environments, primary production is affected by light available to the community of. 4 Lab Dissolved Oxygen primary productivity measured in 3 ways: 9 FRQ A biologist measured dissolved oxygen in the top 30 centimeters of a.

Indicate the conditions under which allele frequencies p and q remain constant from one generation to the next. Calculate, showing all work, the frequencies of the alleles and frequencies of the genotypes in a population of , rabbits of which 25, are white and 75, are agouti. In rabbits the white color is due to a recessive allele, w, and agouti is due to a dominant allele, W. 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?

ap: lab-related ap exam essays lab 1. osmosis and diffusion -

Plants were divided into four groups and were exposed to the following conditions. Water loss was expressed as milliliters of water per square centimeter of leaf surface area. The data for all plants in Group I room conditions were averaged. The average cumulative water loss by the plants in Group I is presented in the table below. Construct and label a graph using the data for Group I. Explain how biological and physical processes are responsible for the difference between each of your predictions and the data for Group I. Explain how the concept of water potential is used to account for the movement of water from the plant stem to the atmosphere during transpiration.

Discuss the interactions of the respiratory, circulatory, and nervous systems during exercise. Design a controlled experiment to determine the relationship between intensity of exercise and heart rate. 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. Remember to label the axes. Choose one of the variables that you identified and design a controlled experiment to test your hypothetical explanation.

Describe results that would support or refute your hypothesis. These changes are called biological rhythms. The graph depicts the activity cycle over a hour period for a fictional group of mammals called pointy-eared bombats, found on an isolated island in the temperate zone. Describe the cycle of activity for the bombats.

Homework for me

Propose a hypothesis regarding the effect of light on the cycle of activity in bombats. Describe a controlled experiment that could be performed to test this hypothesis, and the results you would expect. The day was bright and sunny and the wind was calm. The results of the observation are presented below.

Hour A. Using the graph paper provided, plot the results that were obtained. Explain the biological processes that are operating in the lake to produce the observed data. Explain also how these processes would account for your prediction of results for a heavily overcast day.

Describe how the introduction of high levels of nutrients such as nitrates and phosphates into the lake would affect subsequent observations.

Measurement of Dissolved oxygen in water sample

Explain your predictions. Using measurements of dissolved oxygen concentration to determine primary productivity, design a controlled experiment to test the hypothesis that primary productivity is affected by either the intensity of light or the wavelength of light. In your answer, be sure to include the following. Read more. Upcoming SlideShare. Like this presentation?

Lab 9: Transpiration 2004-2005.

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I never needed anyone to do my homework for me until I got a part-time job in college. Cap and mix until reagent and precipitate dissolve. The brown-eyed female of the F1 generation resulted from a mutational change. Explain why each of these features is necessary. 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.

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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.