Question

Consider the following four statements (I-IV) about certain desert animals such as kangaroo rat. 

I. They have dark colour and high rate of reproduction and excrete solid urine, 

II. They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs. 

III. They feed on dry seeds and do not require drinking water.

IV. They excrete very concentrated urine and do not use water to regulate body temperature. 

Which two of the above statements for such animals are true?

(a) III and I (b) I and II (c) III and ll (d) II and lII

Answer 1

Correct option (c) III and ll 

Explanation:

Kangaroo rat feeds on dry seeds. It seldom drinks water. The requirement of water is met by food (10%) and metabolic water (90%). Water loss is prevented by living in burrows during the day, concentration of urine and solidification of faeces It has a thick coat to minimise evaporative desiccation.