Question

Which of the following adaptations is typical of marine mammals?

Answer 1

I think the correct answer from the choices listed above is option A. A thick layer of blubber is the adaptation that is typical of marine mammals. This adaptation allow the animals to be warm in water. It consists of a thick layer of fat. Hope this answers the question.

Answer 2

I believe the answer is a. thick layer of blubber

Mammal is an warm-blooded animal that need to keep their body warm. Organ that could insulate the heat would be beneficial to keep the temperature, like layer of fat or thick fur. The example of marine mammals would be dolphin, whale, sea lion and polar bear. Thick fur will not give much benefit for mammals in water, so only polar bear have thick fur. But all of them has thick layer of blubber, so option A will be the most appropriate.