An Enema Is

question 15

Multiple Choice

An enema is:

• A) The excessive loss of water from tissues
• B) The introduction of fluid into the rectum and lower colon
• C) Gas or air in the stomach or intestines
• D) A cone-shaped,solid drug inserted into a body opening

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Definitions:

Neutral Variation

Variation that does not appear to confer any selective advantage or disadvantage to the organism.

Adaptive Variation

Differences among individuals in a population that result from genetic changes and environmental factors, enabling better survival and reproduction.

Genetic Polymorphism

The presence in a population of two or more alleles for a given gene locus.

Natural Selection

A fundamental mechanism of evolution where organisms better adapted to their environment tend to survive and reproduce more than others.