It Is Empirically Observed That Some 85% of All Human

question 172

Multiple Choice

It is empirically observed that some 85% of all human variation resides within populations. This means that relatively little genetic variation distinguishes different populations. This may be because:

• A)there may have been high levels of gene flow among human populations.
• B)human populations have only recently spread out from Africa.
• C)natural selection prohibits genetic divergence of human populations.
• D)sexual selection tends to focus on observable traits.

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Definitions:

Axon

A long, slender projection of a nerve cell that transmits electrical impulses away from the neuron's cell body to other neurons, muscles, or glands.

Dendrite

A branched, tree-like structure in neurons that receives neural signals from other neurons.

Hemispheric Specialization

The concept that each hemisphere of the brain is specialized for certain functions, such as language in the left hemisphere and spatial abilities in the right.

Cerebral Cortex

The outer layer of neural tissue of the cerebrum of the brain, involved in higher brain functions such as thought, language, and memory.