All Questions page - 556

If a species preys on others within a community but is not itself preyed upon, and if its absence would bring about significant change within the community, that species is (select all that apply):

a. an ecological dominant.

b. a parasite.

c. a top predator.

d. a host.

e. a keystone species.

The clearwing moth pictured on page 679 has no protective capability, but has evolved to look like a species—the yellow jacket wasp—that does have such capability. As such, what mode of interaction are the clearwing and the yellow jacket practicing? What mode of interaction is being practiced between two species that have protective capability and that have evolved to look alike?

A parasite will often feed on its______, while using it as part of its_________.

a. host; reproduction cycle

b. dupe; camouflage

c. model; resource partitioning

d. dupe; reproduction cycle

e. model; coevolution

Plants such as soybeans house bacteria in their roots that receive food from them, while the bacteria provide the soybeans with a usable form of nitrogen. This is an example of:

a. parasitism.

b. mutualism.

c. fertilization.

d. mimicry.

e. commensalism.

The process by which one species evolves to resemble another species is called:

a. mimicry.

b. mutualism.

c. behaviorism.

d. parasitism.

e. natural deception.

In communities undergoing primary succession, there are general trends toward (select all that apply):

a. shorter-lived species.

b. longer-lived species.

c. smaller species.

d. greater species diversity.

e. less species diversity.

In primary succession, pioneer species will predominately be _____because they ____.

a. migratory animals; can go elsewhere for their food

b. cold-weather species; can withstand harsh conditions

c. insects; can live in so many environments

d. photosynthesizing organisms; can make their own food

e. trees; can run roots deep into the soil for water

K-selected or equilibrium species tend to have ____ offspring to whom they provide ____ care. Conversely, r-selected or opportunist species tend to have ____ offspring to whom they provide ____ care.