Refer to the Figure

question 24

Multiple Choice

Refer to the figure.
The figure shows a matrix of fitness payoffs for interactions between two behaviorally different types of gulls: those that always fish for themselves and those that sometimes steal fish from others. P stands for the baseline fitness that a gull derives when it fishes for itself. B is the fitness gained by a thief when it steals a fish from a fish-for-self type. C is the fitness cost associated with an attempt to steal a prey.
If B were greater than C, the solitary phenotype would

• A) perpetuate itself but not increase over time.
• B) increase steadily over time.
• C) disappear from the population over time.
• D) increase until it made up 50 percent of the population.

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