"Crossing Over" is a key part of the process because it leads to: a
the completion of mitosis
b
growth and repair of body cells
c
genetic variation

What adaptation is apparent in the bodies of the three tortoise species shown in figure 16-2

According to the theory of punctuated equilibrium, at what rate does speciation occur? species change depending on the rate of natural selection. after periods of stasis, new species evolve relatively rapidly. species change slowly and eventually form new species. some species change quickly and others change slowly to balance the overall rate.

Describe how alleles and genes are related