Which of the following is true regarding the number of chromosomes of different species?
a. All mammals have the same number.
b. Numbers vary greatly among mammals unrelated to characteristics.
c. Primates have more than lower mammals.
d. Primates have fewer than lower mammals.
ANS: B
Different species have different numbers of chromosomes that vary unrelated to characteristics.
Health Professions
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Together, the sympathetic nervous system and the parasympathetic nervous system make up the
A) peripheral nervous system. B) central nervous system. C) autonomic nervous system. D) automatic nervous system.
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