Which is the first step in allopatric speciation?
a. loss of genetic variation due to genetic drift
b. genetic divergence due to mutation
c. physical isolation of two populations
d. differential natural selection in different environments in advance!

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.