A Graph Shows the Wage Rate of Factory Workers

question 72

Multiple Choice

A graph shows the wage rate of factory workers. The slope of the line is positive for periods when the wage rate is

• A) high and not changing.
• B) rising.
• C) falling.
• D) high and falling.
• E) low and falling.

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Definitions:

Stabilizing Selection

An evolutionary process that favors the average variants in a population, leading to a decrease in diversity for the trait in question.

Disruptive Selection

Disruptive selection favors individuals at the tails of the distribution of phenotypes present in a population (for example, by acting against individuals with intermediate trait values).

Stalk-Eyed Flies

A group of flies known for having long protrusions from the sides of their heads, bearing the eyes and antennae, a trait believed to be sexually selected.

Stalk Length

The measurement of the stem of a plant, from the base to the beginning of the leaves or flowers.