In humans, beta cells in the pancreas and skin cells both contain the same DNA. However, because of cellular differentiation, the beta cells can make insulin while the skin cells cannot. What causes this difference? Use the
terms epigenome and promoter in your answer.

Ithink the answer is nuclear membrane

No they’ve not done that

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.