Respond to statements 36–40 with reference to the four
microevolutionary processes listed below.
a. mutation
b. gene flow
c. genetic drift
d. natural selection
M 36. erodes species cohesion
E 37. original source of alleles
M 38. preserves species cohesion
D 39. preserves or erodes species cohesion depending on
environmental pressures
D 40. results from differential survival and reproduction
Answers: 36. c, 37. a, 38. b, 39. d, 40. d
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