If Chimpanzee and Human Genomes Differ Only About 1

question 8

Multiple Choice

If chimpanzee and human genomes differ only about 1.3% at the level of DNA base pairs,how can we explain the dramatic differences in appearance,behavior,cultures,etc.,between humans and chimps?

• A)There is a correlation between increased rates of divergence with known functions of alleles in humans and chimps.
• B)Natural selection has been acting on clusters of genes associated with both survival and reproduction in humans and chimps.
• C)Important differences exist in the expression of genes in humans and chimps.
• D)Two of the above can explain the differences.

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Definitions:

Drive-Reduction Theory

A motivational theory proposing that humans are motivated to reduce internal states of tension and psychological discomfort, seeking to restore homeostasis.

Drives

Psychological triggers that stimulate an organism to action toward a specific goal or fulfillment of a need.

Needs

Basic requirements for human survival and well-being, such as food, water, protection, and love.

Internal Source

Information or motivation originating within oneself, as opposed to external factors or influences.