Question

Consider the following four statements (i)-(iv) about certain desert animals such as kangaroorat
(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 required drinking water
(iv) They excrete very concentrated urine and do not use water to regulate body temperature.
Out of these four, which two are correct:

• A. (iii) and (i)
• B. (i) and (ii)
• C. (iii) and (iv)
• D. (ii) and (iii)

Answer 1

The correct option is D (ii) and (iii)

Kangaroo rat is a desert rodent. Its body is covered by hairs. Its urine is more than 20 concentrated than its plasma. This concentrated waste enables it live in dry or desert environments where little water is available for it to drink. Most of its water is metabolically produced from the oxidation of carbohydrates, fats and proteins in the seed that it eats. The animal remains in cool burrows during daytimes and the respiratory moistures condenses in the nasal passages.