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NEET2008ZoologyOrganisms and PopulationsActual

Consider the following four statements ( a - d ) about certain desert animals such as kangaroo rat. (a) They have dark colour and high rate of reproduction and excrete solid urine (b) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs (c) They feed on dry seeds and do not require drinking water (d) They excrete very concentrated urine and do not use water to

Options

  1. Aa and b
  2. Bc and d
  3. Cb and c
  4. Dc and a

Correct answer

B. c and d

Step-by-step solution

Kangaroo rat is the only mammal which does not ingest any water and reamains only on metabolic water which it can utilize due to nasal counter current mechanism. It feeds on dry castor seeds. Sweat glands are absent and secrete concentrated urine with nitrogenous waste as urea.

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