Which of the Following Is Not a Feature of the Tube-

question 20

Multiple Choice

Which of the following is not a feature of the tube- within- a- tube body plan in most animals?

• A) The inner tube consists of digestive organs.
• B) Typically, the mouth and anus form the ends of the inner tube.
• C) The two "tubes" are separated by mesoderm tissue.
• D) Typically, the outer tube consists of a hard exoskeleton.

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Definitions:

Withdrawal

The process of reducing or eliminating the use of a substance to which one has become dependent, often resulting in uncomfortable or harmful physical or psychological effects.

Tolerance

The process by which an organism becomes less responsive to a substance or stimulus after repeated exposure.

Benzedrine

A stimulant drug containing amphetamine, historically used to treat a variety of conditions.

Methedrine

A trademarked name for methamphetamine, a powerful central nervous system stimulant commonly used recreationally and, less commonly, for medical purposes.