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1. What is the role of abiotic factors in an ecosystem? In other words, how do they affect food webs?
2. Why is it easier to classify protists by methods of nutrition and movement than by habitat (where they live)?
3. Briefly explain the purpose of plant hormones.
What intracellular messenger is primary regulator of adaptation of photoreceptors?What Intracellular second messenger is primary regualator.
Determine what effect did the agricultural revolution have on the growth of the human population?
Why are phytoplankton populations so low in certain parts of the ocean, even though there appears to be plenty of sunlight and nutrients?
You are studying the cleavage of two substrates by chymotrypsin,an ester and an amide. Except for the scissile bond, the substratesare identical. With which substrate will the acyl enzyme be formedmore rapidly? Why?
How do plant and animal cells metabolize energy in complementary ways? What does this suggest about the flow of energy and the recycling of elements through living organisms? Could we think of any other similar relationships.
Explain the process of skeletal muscle contraction, starting from the efferent motor neuron's action potential, and ending with the relaxation of the muscle.
calculate the amount of fructose 6 phosphate formed from glucose 6 phosphate in a 10 milliliter incubation system if 0.5M G6P is incubated overnite at 25oC and the equilibrium constant is 0.67.
What happens in a skeletal muscle when the maximal stimulus is achieved? What is the hepatic portal system and "First PassElimination"?
A dihybrid cross AA bb x aa BB is made in which A is dominant but Band b are co-dominant. How many phenotypic classes are expected in the F2generation?
Reactive oxygen species are unstable, or reactive, compounds that result from partial reduction of oxygen. Reactive oxygen species can cause damage to molecules, including membrane lipids and nucleic acids.
A 2.5 mg/ml stock solution was diluted as described in the table below and then the absorbance of each dilution was estimated and presented in the table given below.
Albinism is an autosomal recessive trait in the clouded salamander (Aneides ferreus). In the main cave population at Oregon Caves National Monument, 100 salamanders are albino while 900 individuals are not (891 AA and 9 Aa). Assume that this popul..
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