The Number of Species Within a Community Is Usually Greatest

question 31

Multiple Choice

The number of species within a community is usually greatest when

• A)no disturbance occurs.
• B)a low frequency of disturbance occurs.
• C)an intermediate frequency of disturbance occurs.
• D)a high rate of disturbance occurs.

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Definitions:

Flagellum

A slender, whip-like appendage that enables many protozoa, bacteria, and spermatozoa to swim.

Microvilli

Minute projections of the plasma membrane that increase the surface area of the cell; found mainly in cells concerned with absorption or secretion, such as those lining the intestine or the kidney tubules.

Choanoflagellate

Single-celled organisms that are considered to be the closest living relatives of animals, characterized by a flagellum surrounded by a collar of microvilli.

Rhizaria

A supergroup of mainly unicellular eukaryotes, characterized by their amoeboid movement mechanism and often elaborate shells.