What type of transport was shown here? -passive diffusion
-because the molecules moved DOWN the concentration gradient.

-active facilitated diffusion
-because the molecules moved DOWN the concentration gradient with the help of proteins.

-passive diffusion
- because molecules moved UP the concentration gradient.

- active transport
-because the molecules moved UP the concentration gradient with the help of proteins.

- active transport

- because the molecules moved UP the concentration gradient with the help of proteins.

Explanation:

In simple diffusion, small noncharged molecules or lipid-soluble molecules pass between the phospholipids to enter or leave the cell, moving from areas of high concentration to areas of low concentration (they move down their concentration gradient).

answer: c

explanation:

the correct answer is:

a population changes in response to a change in the environment.