Suppose a Predator Has Two Different Prey, Species 1 and Species

question 138

Multiple Choice

Suppose a predator has two different prey, Species 1 and Species 2. You perform a series of experiments in which the density of Species 1 is varied while the density of Species 2 is kept constant. At each Species 1 density, you determine how many prey of Species 1 and 2 are taken by the predator. The two curves (a and b) plotted in the following graph show the outcome of this study. Based on the graph, which of the following statements is true?

• A) Curve a indicates that Species 2 is the preferred prey.
• B) Curve b indicates that Species 1 is the preferred prey.
• C) Curve b indicates that Species 1 is not the preferred prey.
• D) Both a and c
• E) Neither curve provides insight into the prey preference of the predator.

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