Adaptive radiations (select all that apply):
a. can be seen most clearly in mainland environments.
b. are episodes of rapid speciation that occur when the “fit” between environment and species is in flux.
c. concern the evolution of heat loss in vertebrates experiencing stressful climates.
d. are exemplified by the Hawaiian drosophilid flies.
e. can be seen most clearly in island environments.
Match the terms with their meanings:
a. gene pool
a variant form of a gene
c. allele frequency
the genetic makeup of an organism
exchange of genes between populations
e. gene flow
the relative representation of a given form of a gene in a population
Which of the following statements is true of microevolution? (Select all that apply.)
a. It is a change in allele frequency within populations.
b. It is caused by inheritance of characters acquired during the life of an organism.
c. It is only seen when some allelic variants cause individuals to have increased reproductive success.
d. It always leads to adaptation.
e. It is caused only by natural selection.