The molecular evidence of how the cytochrome c gene changes with time suggests that this gene evolves
A. at a constant rate.
B. hardly at all.
C. more rapidly than any other gene.
D. in spurts.
Answer: A
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What is a population's carrying capacity?
A. Its density-independent growth B. Its maximum population size to remain stable C. Its exponential growth over time D. Its minimum population size to avoid extinction
Crowding ____
a. has a positive effect on reproduction b. decreases the growth rate of individuals c. only occurs in plant species d. causes immigration e. stimulates developmental and behavioral changes
Mucus production that blocks ducts of certain glands and lung passages is a symptom of ____________________. What will be an ideal response?
Which of the following is a potential risk of exotic species?
a) introduction of new diseases b) native species being outcompeted c) alteration of habitats d) all of these are potential risks