T Cells

question 39

Multiple Choice

T cells

• A) are important in long-term immunity because they form memory cells
• B) can release as many as 2000 antibodies a second
• C) can release poisons that can directly kill cells
• D) form plasma cells when activated

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Definitions:

Competitive Exclusion

The ecological principle that two species competing for the same resources cannot coexist at constant population values if other ecological factors remain constant.

Paramecium Caudatum

A species of ciliate protozoan that lives in freshwater environments and is known for its slipper-like shape.

P. Aurelia

A species of single-celled ciliate protozoa that is often studied in genetics and biology.

Mimicry

An evolutionary pattern in which one species becomes more similar in appearance to another.