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You are an ecologist interested in energetics of ecological systems. You begin your current research program with a study of primary productivity of corn plants growing in a field in Iowa during mid-summer. At noon on a sunny day, you enclose a single leaf (still attached to the plant) in a transparent chamber. The chamber is connected to a measurement device called an infrared gas analyzer, which is capable of measuring minute changes in the concentration of carbon dioxide (CO2) of the atmosphere within the chamber. The chamber is also maintained at a constant 30°C (same as the outside air temperature) during your observations. You first expose the corn leaf to full sunlight and observe that CO2 is being depleted by the leaf from the chamber at a rate of 16 mg CO2 per 100 cm2 leaf area per hour. The measurements are taken over time so both photosynthesis and respiration are occurring during the measurement. You then cover the chamber with aluminum foil to exclude all light and observe that CO2 is being released by the leaf into the chamber at a rate of 2 mg CO2 per 100 cm2 leaf area per hour. 1. What is the rate of net primary productivity for this leaf? Explain your answer. 2. What is the rate of gross primary productivity for this leaf? Explain your answer.
Make following dilution: a working concentration of 100 ml 15 U/uL from an enzyme stock of 756,431 U/uL. Will you use a serial dilution? Why or Why not.
Examine the nature of water and how its unique chemical properties impact water regulations in plants. Elucidate the structure and function of the leaf to water regulation.
Assume a level area of granite rock was the parent material in both cases; describe in general terms how you would expect two soil profiles to differ, one in warm, semiarid grassland and the other in a cool, humid pine forest.
Within an essay response, discuss the next concepts: an antioxidant's function, free radicals and their effect on the human body, sources of vitamin C, optimal delivery system for vitamin C, and precautions for use of vitamin C.
Red-green colorblindness is a sex-linked trait. A normal woman whose father was red-green colorblind marries a normal man. What is the expected proportion of color-blind children? Five both the phenotypes and genotypes, including gender.
Today we learned about how the electrical signals are carried throughout your heart to create synchronous but separate contraction of the atria and ventricles.
The American Chestnut Tree, which once made up more than 25 percent of North American hardwoodforests, were killed off by a deadly fungal blight that does not affect the closely related AsianChestnut Tree.
What could be expected phenotypes, and in what number will the y be expected? Suppose no linkage.
What aspects of social and work environment in a college cafeteria will be of particular interest to a sociologist since of his or her sociological imagination.
A poll is made of four allozyme loci in a particular population. The alleles are labeled alphabetically according to the mobility of their products in electrophoresis.
Assume you have a bacterial suspension and you need to dilute it to .0010 of the initial concentration so that you can determine thenumber of colonies per milliliter.
Would the blood pressure in the pulmonary capillaries at the bottom of a lung be the same as the blood pressure in the capillaries at the top of a lung in the standing individual? Which area would have the lower blood pressure?
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