In the b-galactosidase lab, why was o-nitrophenol-b-d-galactosidase (onpg) used?

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Differentiation of cells changes the nucleic information. true false