Question

Which of the following statements is true?

A. Producing more offspring always increases the fitness of an organism.

B. Gene flow between populations may either facilitate natural selection by increasing genetic variation or slow it down by counteracting the effects of selection in that environment.

C. If an allele is fixed in a population, both homozygous and heterozygous genotypes will be present, but the number of homozygotes will be greater.

D. Genetic drift, gene flow, and natural selection can all produce adaptive evolution.

E. A & B

F. A & C

G. A & D

H. A,B & C

I. A,B & D