GMAT Critical Reasoning
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Source: PREP
Level: 1
When a caterpillar emerges from the egg on a tree branch, it immediately climbs upward until it finds a leaf bud to eat. Biologists thought that this behavior displayed an innate tendency to move in the direction opposite to the pull of gravity. In a recent experiment, a strong light source was placed at the bottom of a tree, and caterpillars, after hatching, climbed downward.
Which of the following hypotheses is best supported by the statements given?
- A Caterpillars have an innate tendency to move in the direction of gravity.
- B Newly hatched caterpillars are unable to see in the dark.
- C Newly hatched caterpillars move towards the strongest light source in the environment.
- D Newly hatched caterpillars move toward the leaf bud nearest to them.
- E The eyes of newly hatched caterpillars become less sensitive to light over time.