Whale is warm-blooded animal but survives in cold seas. The main device for keeping the animal warm in thick?
A. Blubber
B. Pelage
C. Muscles
D. Blood vessels
Answer:A
Whale is warm-blooded animal but survives in cold seas. The main device for keeping the animal warm in thick?
A. Blubber B. Pelage C. Muscles D. Blood vessels