Match the reproductive isolating mechanism with the means by which it works:

a. temporal isolation	populations utilize different habitats
b. ecological isolation	populations employ different courtship or mating displays
c. behavioral isolation	mating occurs at different times of day or year
d. gametic isolation	progeny of a cross are unable to reproduce
e hybrid sterility	egg and sperm do not fuse

In ocean-dwelling creatures such as sea urchins or corals, sperm and eggs are released into the water by males and females and fertilization occurs externally. If several closely related species of coral live in the same location, what reproductive isolating mechanisms could potentially prevent interbreeding? (Select all that apply.)

a. behavioral isolation

b. gametic isolation

c. temporal isolation

d. ecological isolation

e. hybrid infertility

Order the following categories into the appropriate biological hierarchy, with the least inclusive category first

a. family

b. species

c. phylum

d. genus

e. class

Factors that can be problems in determining relatedness among organisms may include (select all that apply):

a. homologous traits.

b. analogous traits.

c. convergent evolution.

d. poor fossil record.

e. shared derived traits.

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.

True or false: If an insect has 1,000 offspring, we can label it as “fit” in an evolutionary sense.

In stabilizing selection, forms that are _______ are favored over forms that are_______.

We normally think of evolution working through _________, in which a character moves toward _______.

What the agents of microevolution all have in common is that each of them can alter _______ in a population.

Genetic drift is a _______ alteration of _________ in a population that has its greatest effect on _______ populations.

In sexual selection, differential reproductive success comes about because of differential success in obtaining _______.