AP BIOLOGY

Detailed explanation-1: -The thick layer of fat found in polar bears, penguins, whales, seals and dolphins which helps to protect against the cold and also aid in buoyancy is called blubber.

Detailed explanation-2: -They have a thick layer of body fat, which keeps them warm while swimming, and a double-layered coat that insulates them from the cold Arctic air.

Detailed explanation-3: -An important adaptation for marine mammals is blubber, a thick, insulating layer of fat beneath the skin that helps to keep body warmth in and the cold of the air or water out.

Detailed explanation-4: -A Polar bear has a thick fur and a thick deposit of fat layer under its skin. This gives it protection from the freezing cold by preventing heat loss from the body. It acts as an insulator.