Digital SATReading and Writing: Information and IdeasMedium
A marine biologist is studying the feeding habits of a newly discovered species of deep-sea fish. Observations reveal that this fish possesses a large mouth, bioluminescent lures, and extremely sharp, inward-pointing teeth. It is typically found in areas with sparse prey populations. The biologist hypothesizes that this species is an ambush predator. Which finding, if true, would most strongly support the biologist's hypothesis?
- AGenetic analysis indicates a close evolutionary relationship to known scavenger species.
- BThe fish exhibits a slow metabolic rate and can go for long periods without eating.
- CUnderwater video footage shows the fish remaining motionless for extended periods, then rapidly striking at passing organisms.
- DThe fish's stomach contents primarily consist of small, fast-moving crustaceans.
Show answer & explanationAnswer & explanation
Correct answer: C. Underwater video footage shows the fish remaining motionless for extended periods, then rapidly striking at passing organisms.
An ambush predator waits for prey and then strikes. The video footage directly shows this behavior, which aligns perfectly with the hypothesis and the fish's physical adaptations (lures, large mouth, sharp teeth, sparse prey habitat).
Why the other options are wrong
- A. This would contradict the hypothesis, suggesting it's not a predator at all.
- B. A slow metabolic rate is common in deep-sea fish but doesn't directly support *ambush* predation over other feeding strategies.
- D. While consistent with predation, it doesn't specifically confirm *ambush* predation versus active hunting.
Supporting a Hypothesis
Supporting a hypothesis involves identifying additional evidence or observations that strengthen the likelihood of the hypothesis being true. The best support directly aligns with the proposed explanation.
- Look for evidence that directly demonstrates the hypothesized behavior or mechanism.
- Evidence should be consistent with all aspects of the hypothesis.
- Avoid evidence that is merely consistent but not uniquely supportive.
Memory trick: New Evidence Elevates the Explanation's Esteem.