Your aging aunt luella has has a series of small strokes. these strokes can progressively damage her brain and are most likely to produce dementia
A mutation in DNA affects the entire protiens synthesis process by producing the incorrect amino acids in the wrong places, causing issues with the ability of the organism to survive depending on what the protein is in charge of.
A, because, the entire point of his theory was to prove that changes don't happen spotaneously!
The answer should be "Island finches resembled mainland finches, but were not the same species."
