Imagine the river dries and the squirrel populations again share the same physical area. But they cannot interbreed. Evolutionary forces have acted independently on the populations while they were separated by the river, and ____________ has occurred.

a. selective forces

b. more

c. allopatric speciation

d. microevolutionary events

e. communicate

f. interbreed

g. less

h. gene pool

i. symmetric speciation

j. macroevolutionary events


c. allopatric speciation

Environmental & Atmospheric Sciences

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Environmental & Atmospheric Sciences