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In which situation would all of the larger elephants in a herd most likely stand shoulder-to-shoulder around a young calf?

to protect the calf from predators
to play a game with the calf
to keep the calf shaded if it is sunny out
to keep the calf dry if it is raining

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.

Depending on the organism the number of in a cell may change

Are the layers of rock above and below the coal older or younger?