For Natural Selection to Occur, Variation Must Exist

question 64

Multiple Choice

For natural selection to occur, variation must exist. This is true because without variation

• A) there is no way for change to occur between generations.
• B) the one trait that exists is always advantageous, and change is not necessary.
• C) there is no competition among individuals.
• D) traits are never inherited by offspring.

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Definitions:

Memory Span Tasks

Cognitive tasks that measure the number of items, typically words or numbers, that an individual can hold in short-term memory and recall in correct order.

Korsakoff's Syndrome

A chronic memory disorder caused by severe deficiency of thiamine, most often associated with alcoholism.

Chronic Alcoholics

Individuals who suffer from long-term addiction to alcohol, often leading to severe health and social problems.

Fetal Alcohol Syndrome

A set of physical and mental birth defects that can result when a woman drinks alcohol during her pregnancy, leading to lifelong issues.