B - When many individuals of the same species are available for mating.
And
C - When the individuals live in a stable environment in which they thrive.
The main and the most promising difference between active and passive transport is, passive transport does not require energy while active energy does.
Answer: As each cell differentiates, the <em>DNA </em>changes so that each type of cell has different <em>DNA</em> once it reaches maturity. Mutations in the cells’ nuclei lead to new combinations of <em>DNA</em>, resulting in different shapes and functions in the different types of cells.
Hope this helps!
1. <span>composed of cells with cell walls
2. </span><span>Vertebrates contain a backbone, while invertebrates do not.</span>
