PrepTest 107, Section 2, Question 19
Scientists have long known that the soft surface(465 more words not shown)
Which one of the following(15 more words not shown)
- ATo determine the(20 more words not shown)
- BTo determine whether(24 more words not shown)
- CTo determine whether(18 more words not shown)
- DA fisherman catches(19 more words not shown)
- EA game warden(19 more words not shown)
Reading the passage
What did Scheich actually test? He suspected that the platypus detected prey through electric fields. He supplied that cue with a battery, then watched for the animal's response. Our rough prediction is an experiment that supplies a suspected sensory cue to test an animal's ability.
Working the answers
- A
Decoys and calls are used to investigate mating habits, but no particular sensory mechanism for detecting prey is being tested. That misses the more specific structure of Scheich's experiment.
- B
This initially looks promising: a researcher tests a proposed ability by supplying a stimulus. But it concerns navigation through echoes, not detecting prey. Playing cries also isn't the same as providing the returning echoes named in the hypothesis.
- CCorrect
This is the closer match. Heat sensitivity takes the place of electrical sensitivity, and the heat-generating object takes the place of the battery. In each case, an artificial source supplies the suspected cue to test whether the animal uses it to detect prey. C adds the hunting connection that B lacks.
- D
The fisherman is trying to catch fish, not testing a hypothesis about their sensory abilities. Using an artificial lure alone doesn't reproduce the experimental purpose.
- E
The warden is also capturing an animal, using actual food as bait. There's no experiment testing which sensory cue helps it find prey.
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