Which of the following is a source of genetic variation within a species?
a) cloning
b) mutation
c) selection breeding
d) natural selection

a, i am pretty sure.

the animal that would be cutest if scaled down to the size of a cat? elephant

ya the other dude is right

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.