Question

About 96% of Scandinavian moths have ears tuned to the ultrasonic pulses that bats, their predators, emit. But the remaining 4% do not have ears and are deaf. However, they have a larger wingspan than the hearing moths, and also have higher wing-loadings—the ratio between a wing's area and its weight—meaning higher maneuverability. Which one of the following can be best inferred from the above passage?

• A. A higher proportion of deaf moths than hearing moths fall prey to bats.
• B. Deaf moths may try to avoid bats by frequent changes in their flight direction.
• C. Deaf moths are faster than hearing moths, and so are less prone to becoming a bat's dinner than hearing moths.
• D. The large wingspan enables deaf moths to better receive and sense the pulses of their bat predators.

Hint:

When inferring, focus on the features described and link them logically to the likely consequences.

Answer 1

The Correct Option is C

The passage mentions that deaf moths have a larger wingspan and higher wing-loading, implying higher maneuverability. This suggests they can avoid predators more effectively, making them less prone to being caught by bats. The passage does not mention sensory improvement or proportional prey rates, hence (3) is the best inference.