What do the different scientific theories about how life began on earth have in common? (2 points)
a seed of life was started through meteorite bombardment.
carbon-based molecules formed in an oxygen-poor environment.
early life was aquatic because all of earth was initially covered by ocean.
early earth had to warm considerably after its formation before it could support life.

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.

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

Cells are adapted to preform specific functions. which of the following terms refers to this capability?