The degree of parental investment required often results in the nonrandom mating behavior called ________.
A. mate choice
B. allopatry
C. fidelity
D. preferability
Answer: A
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The two principal divisions of the peripheral nervous system are the
a. somatic and autonomic systems. b. sympathetic and parasympathetic systems. c. peripheral and central systems. d. afferent and autonomic systems. e. cranial and skeletal nerves.
Which of the following statements is true of bacteria on this planet?
A) There are more helpful than harmful bacteria. B) There are more harmful than helpful bacteria. C) There are about as many helpful as harmful bacteria. D) Bacteria have neither a positive nor a negative impact on human society.
What type of antibody is produced first after the initial exposure to antigen?
A. IgD B. IgM C. IgE D. IgA E. IgG
Approximately what percent of the human genome encodes genetic information?
A. 1 D. 15 B. 3 E. 50 C. 5