Question

Useful mutations become established much more quickly in a population of microorganisms, such as the cluster of E-coli bacteria shown here, than they do in humans. The MOST LIKELY reason for this is that microorganisms
A) are smaller than humans.
B) reproduce asexually and at a fast rate.
C) are transparent, so their mutations are observed more often.
D) are exposed to environmental mutagens more often than humans.

Answer 1

B) reproduce asexually and at a fast rate. 

Answer 2

I'd like to say though, that the answer is B. :) Hope this helped.