Question

Which is true about the following statement about kangaroo rates.
(i) They have dark color, high rate or reproduction and excrete solid urine.
(ii) They do not drink water, breathe at a slow rate and have their body covered with thick hair.
(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.

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

Answer 1

Kangaroo rats well adapt themselves for desert life. They get all the water they need from their food. Kangaroo rats have evolved an extraordinary ability to perform high powered jumping movements.

Complete answer:
Kangaroo rats have long tails and big high feet with four toes. They have large heads with big eyes and small ears. They are of light brown color and white underbelly.

Habitat:
Kangaroo rats are inhabitants of deserts. It includes open desert scribe, grasslands, sandy soils or flats. They are generally found in the drier regions of western and southwestern U.S.

Diet:
They eat seeds from a variety of desert grams as well as mesquite beans.
Kangaroo rats generally live in burrows under the soil, sometimes burrows are located at the base of a shrub or bush.
Their life span is short of only $2 - 5$ years. They can weigh upto $128gm$.

Kangaroo rats don’t sweat or pant like other animals to keep cool because it would lead to loss of water from their body. They are sensitive to extreme temperature. To live in the hot and dry habitat, they lower their metabolic rate by reducing loss of water through their skin. They obtain enough water from metabolic oxidation of seeds they eat to survive and aren't used to drink water at all. For conservation of water they produce very concentrated urine.

Hence, the correct answer is option (C).

Note: Kangaroo rats are capable of meeting their water requirement by metabolic oxidation of seeds curd producing very concentrated urine to conserve water because they do not use water to regulate body temperature as they live in burrows all over the night.