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GATE 2022 XH5 (Psychology) – Question 25

Reasoning and Comprehension · Verbal reasoning and comprehension · 2 marks · Multiple select

Shark’s teeth have evolved to correspond to the diet of each particular species of shark. Consequently, the teeth of the great white shark bear little resemblance to those of the bull shark or nurse shark. There were essentially four different shark diets and thus four varieties of shark teeth. Sharks that feed on fish have needle like teeth, perfect for spearing and ripping. Sharks that eat mammals such as seals and sea lions have heavy, serrated teeth, typically triangular on the upper jaw and pointed on the lower jaw. Shark that feed in the benthic zone of the ocean have flattened teeth for crushing the shell of the creatures they find scuttling in the sand or clinging to rocks. Sharks that bask have teeth that are largely non-functional; these sharks filter food from the water by passing it through their gills.

Which of the following is/are the CORRECT inference(s) as per the passage?

  1. Shark’s teeth are not specially designed for slaughter.
  2. The shape of the shark’s teeth relates to its prey.
  3. Some species of sharks filter food through their gills.
  4. Shark’s teeth relate to its diet.

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Show answer and explanation

Correct answer: (B) The shape of the shark’s teeth relates to its prey.; (C) Some species of sharks filter food through their gills.; (D) Shark’s teeth relate to its diet.

Explanation

The passage says that the teeth evolved to match each species' diet and prey (B and D), and that basking sharks filter food through their gills (C). It describes spearing, ripping and crushing teeth, so A is not supported.