Which of the following statements explains why the sugar glider and the flying squirrel both have the ability to glide? a) both evolved at the same time in geologic history. b) both interbred and blended their gene pools in the past. c) both learned to glide by imitating the same kinds of bird species. d) both adapted to similar niches in which gliding increased their chances of survival.

Which of the following statements regarding anfinsen's denaturing experiments with ribonuclease a (rnase a) are valid? exposing the denatured protein to air oxidation and then dialysis to remove urea restored the protein to its original functionality. removing urea by dialysis and then allowing air oxidation of the denatured protein restored the protein to its original functionality. denaturing the protein with both urea and β-mercaptoethanol yielded an inactive protein. anfinsen concluded that protein folding is determined by its primary sequence.

What causes darkening of the skin as melanin production increases

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?