A(n)____ Explanation Describes Why a Structure or Behavior Evolved as It

question 106

Multiple Choice

A(n) ____ explanation describes why a structure or behavior evolved as it did.​

• A)functional
• B)​ontogenetic
• C)​physiological
• D)evolutionary

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Definitions:

Ducts

Tubes, channels, or passages in the body or in a machine that convey fluid or air from one location to another.

Interstitial Fluid

Fluid that surrounds the body’s cells; consists of dissolved substances that leave the blood capillaries by filtration and diffusion.

Metabolism

The set of life-sustaining chemical reactions in organisms to convert food into energy, and build or maintain their cells.

First Messenger

Chemical signal, such as a peptide hormone, that binds to a plasma membrane receptor protein and alters the metabolism of a cell because a second messenger is activated.