For Two Populations to Accumulate Enough Genetic Differences to Cause

question 70

Multiple Choice

For two populations to accumulate enough genetic differences to cause speciation,the factors that promote these differences

• A) must operate in populations that are not physically separated.
• B) must have a greater effect than does the amount of ongoing gene flow.
• C) must prevent mutations.
• D) should include polyploidy.

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Definitions:

Antigens

Substances that provoke an immune response, including the production of antibodies, when detected by the body.

Lymph Nodes

Small, bean-shaped structures that filter lymph fluid and play an essential role in the body's immune response.

Helper T Cells

A type of T cell that plays a central role in the immune response by activating other immune cells.

World Health Organization

The international public health agency of the United Nations, aimed at promoting health, keeping the world safe, and serving the vulnerable.