Which Factor Is Characteristic of Disturbances Within a Community

question 199

Multiple Choice

Which factor is characteristic of disturbances within a community?

• A) They are usually predictable.
• B) They are usually similar in magnitude.
• C) They are usually small-scale in their geographic impact.
• D) They are always caused by biotic factors.
• E) They kill some species but provide space and resources for others.

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Definitions:

Passive Transport

Membrane-crossing mechanism that requires no energy input.

Facilitated Diffusion

A process of passive transport, with the aid of integral membrane proteins, allowing substances to move across cell membranes without energy expenditure.

Receptor-Mediated Endocytosis

A cellular process by which cells internalize molecules (like hormones, nutrients, and proteins) by the inward budding of plasma membrane vesicles containing proteins with receptor sites specific to the molecules being internalized.

Allosteric Regulation

The regulation of an enzyme's activity through the binding of a molecule at a site other than the enzyme's active site, causing a change in its shape.