Immune System Cells Differentiate Between Self and Foreign Cells by Their

question 40

Multiple Choice

Immune system cells differentiate between self and foreign cells by their ______.

• A) cell walls
• B) shapes
• C) markers
• D) sizes
• E) cell processes

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Definitions:

Ratify

To formally approve or confirm an agreement or treaty, making it officially valid.

Principal

The original amount of money invested or loaned, not including profits or interest.

Agent's Unauthorized Contract

A contract or agreement made by an agent without the proper authority or permission from the principal, often raising questions of enforceability and liability.

Third Party

An entity that is involved in a transaction or situation but is not one of the two main entities directly involved, often providing an external perspective or service.