Gene flow counters the effects of
a. natural selection.
b. mutation.
c. genetic drift.
d. all of these.
e. none of these.
D
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Which of the following statements about honeybee communication is not correct?
A. The hive is like a giant organism, fixed in location but sending out workers in all directions to forage. B. Returning foragers pass samples of collected food to other workers that surround her upon return. C. The workers use olfactory cues to go out and find food once given a sample by returning foragers. D. Returning foragers use the waggle dance to provide information about the direction of the food source in relationship to the sun. E. The waggle dance can be in direct line with the sun or at various angles to the left or right of the direct line of the sun.
Most species produce large numbers of offspring by sexual reproduction. This is important to the theory of natural selection because
A. each individual is unique and this diversity allows selecting agents to operate. B. selecting agents often lead to the death of large numbers of offspring. C. the diversity shown in the offspring makes it highly likely that some of them will be able to reproduce successfully. D. All of the choices are correct.
The rediscovery of Mendelian inheritance caused increased scrutiny of Darwin's theory of natural selection because of an apparent conflict in the two concepts
This conflict was based on the observation that Darwin focused on continuous traits, while Mendelian genetics deals with: a. discrete characters. b. alleles. c. flowers. d. genotypes. e. All of the above.
Which of the following statements are true or false? If a statement is false, explain why it is false
A. Enzymes lower the free energy released by the reaction that they facilitate. B. Enzymes lower the activation energy for a specific reaction. C. Enzymes increase the probability that any given reactant molecule will be converted to product. D. Enzymes increase the average energy of reactant molecules.