Variation May Exist Because Environments Have Recently Changed and Genes

question 64

Multiple Choice

Variation may exist because environments have recently changed and genes that were previously beneficial have not yet been eliminated. This may describe

• A) Tay-Sachs disease.
• B) sickle-cell anemia.
• C) non-insulin-dependent diabetes.
• D) P. falciparum malaria.

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Definitions:

Noise

Unwanted or distracting sounds that can interfere with communication or concentration.

Guthrie

An American psychologist who proposed the theory of contiguity, suggesting that learning occurs when a stimulus and response occur close together in time.

Crying Behavior

An emotional and physiological response that can serve various functions, including communication, self-soothing, or as a response to stress or stimuli.