Question

In the polar seas, aquatic ...a... like ...b... have a thick layer of fat called ...c... below their skin that acts as an ...d... and reduces loss of body heat.

• A. a—fishes, b—sharks, c—clasper, d—conductor
• B. a—mammals, b—seals, c—blubber, d—insulator
• C. a—fishes, b—seals, c—blubber, d—insulator
• D. a—mammals, b—seals, c—blubber, d—conductor

Answer 1

The correct option is B a—mammals, b—seals, c—blubber, d—insulator

Aquatic mammals like whales and seals, living in polar seas are exposed to very cold temperatures. In order to maintain their body temperatures they have suitable adaptations like the presence of subcutaneous fat called blubber. Blubber is made up of adipose tissue that is a poor conductor of heat thus acting as an insulator.
In the polar seas, aquatic mammals (a) like seals (b) have a thick layer of fat called blubber (c) below their skin that acts as an insulator (d) and reduces loss of body heat.