Q. 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 concenntated urine and do not use water to regulate body temperature. Which two of the above statements for such animals are true?
A) III and IV
B) II and III
C) III and I
D) I and II
Explanation
Kangaroo rat is a desert rodent. It’s body is covered by hairs. Its urine is more than 20 times concentrated as its plasma. This concentrated waste enables it to live in dry or desert environment, where little water is available to drink. Most of its water is metabolically produced from the oxidation of carbohydrates, fats and proteins in the seeds that it eat. The animal remains in cool burrow during day time and the respiratory moisture condensed in nasal passages.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.