Mammals that live in the arctic ocean have a large amount of blubber, which is a fatty tissue just beneath the skin. which statement best relates why these animals have so much blubber?

1)lipids in blubber insulate the animals from cold water.
2)proteins in blubber the animals move to stay warm.
3)carbohydrates in blubber provide all the energy that the animals need to stay warm.
4)nucleic acids build the lipids in blubber, which keep animals warm by regulating cell activities.

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.

Scientists discover two populations of mice on either side of a major river. the two populations have almost identical genes but the mice from one side cannot breed with mice from the other. this is most likely because

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic