Which of the following adaptations is typical of marine mammals?
a. thick layer of blubber
b. body covered in thick fur
c. webbed hands and feet
d. breathing apparatus on the sides of the head

The right answer is a. thick layer of blubber

Blubber is a layer of subcutaneous fat, dense and vascularized. It is one of the characteristics of marine mammals that can represent up to 50% of the mass of an individual of certain species at a phase of their life.

Blubber is highly vascularized, with high collagen fiber content, and serves these animals as insulation and energy reserve but also plays a hydrodynamic and flotation role. Blubber was the main reason for whaling.

The thickness of this fat layer is considered indicative of the good health of some whales.

as a camel goes without food, its hump begins to shrink. its fur prevents the camel from sweating too much.camels store fat in their humps, not water.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.