Question

A monkey and a crocodile are having a swimming competition in a river of cold water. How do you think the internal body temperature of the two creatures will vary during the competition?

• A. Crocodile: increases​; Monkey: decreases
• B. Crocodile: decreases​​; Monkey: increases​
  
• C. Crocodile: decreases​​; Monkey: no change
• D. Crocodile: no change​​; Monkey: decreases​

Answer 1

The correct option is C Crocodile: decreases​​; Monkey: no change

The crocodile is a reptile and the monkey is a mammal.

Reptiles are ectotherms i.e., whose body temperature fluctuates with the surroundings.
Mammals are endotherms i.e., their body temperature remains constant irrespective of the outside temperature.

Swimming in cold water will decrease the body temperature of the crocodile as it is an ectotherm. Monkey is an endotherm and thus, its body temperature remains constant irrespective of the outside temperature.