There are 2 predators in this environment, one eats only small fish and one eats only large fish. So, the frequency of medium size fish would go up in generation 2. This is an
example of selection?
- allopatric
- stabilizing
- disruptive
- directional

plant because they survive by water, sunlight, ex.

explanation:

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.