Four of the following maintain genetic equilibrium and allele frequencies. Which one is the exception?
a. lack of gene flow
b. large population interbreeding freely
c. differential survival and reproduction
d. random mating
e. absence of mutations
ANSWER: c
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Arthus reactions and serum sickness are examples of _________ hypersensitivity
A. type I B. type II C. type III D. type IV E. type V
DNA profiling is helpful in
A) curing cancer. B) analyzing food. C) treating male infertility. D) preventing male pattern baldness.
The most important physical characteristic of lipids with regard to living organisms is that they
A) are hydrophobic. B) are very large and therefore difficult to store. C) dissolve easily in water. D) are typically a form of waste product that is difficult to eliminate. E) are denser than water.
Reservoirs include
A. water. B. humans. C. soil. D. animals. E. All of these choices are correct.