Ecosystem Energy

Animals gathering around a water hole in a drought prone area and establishing hierarchies of access to the water is an example of competition.

• True

• False

A species with a restricted tolerance for environmental conditions is

• A. a specialist.

• B. a generalist

• C. highly competitive.

• D. an autotroph.

The first consumer level of all food pyramids is ...

• A. consists of primary producers.

• B. consist of primary consumers.

• C. is chemosynthesis.

• D. is photosynthesis.

The first trophic level of all food pyramids

• A. consists of primary producers.

• B. consist of primary consumers.

• C. is chemosynthesis.

• D. is photosynthesis.

A deer browsing on a shrub is an example of what behavior ...

• A. predation.

• B. parasitism

• C. herbivory.

• D. photosynthesis.

Two populations of a deer species are separated when a glacier forms. After the glacier melts, the two populations have become different species. This is an example of allopatric selection.

• True

• False

You have many species of bacteria living in your gut that help you with digestion. This relationship is best defined as commensalism.

• True

• False

Communities deep on the ocean's floor depend on chemosynthesis for their energy.

• True

• False

A food web cascade occurs when one species has an indirect effect on species at a different level of the energy pyramid.

• True

• False

An organism’s ____________________ describes its use of resources and functional role in a community.