Which of the Following Is Not a Characteristic of the Echinoderms

question 13

Multiple Choice

Which of the following is not a characteristic of the echinoderms?

• A) They have bilateral symmetry in larvae.
• B) They exhibit cephalization.
• C) They have spiny skin.
• D) They have radial symmetry in adults.
• E) They have a complete digestive tract.

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Definitions:

Multiple Orgasms

The experience of having more than one orgasm during a single sexual activity session.

Refractory Period

A period immediately following a stimulus during which a nerve or muscle is unresponsive to further stimulation.

AIDS Virus

Refers to the human immunodeficiency virus (HIV) which causes AIDS (acquired immunodeficiency syndrome), a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive.

Blood

A body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away.