During diffusion, molecules move
a) in no predictable pattern.
b) to points equidistant from the point of origin.
c) from lower concentration to higher concentration.
eliminate
d) from higher concentration to lower concentration.

During diffusion molecules move from a higher concentration to a lower concentration. It is how the molecules move in and out of cells. (D)

Hope this helps

- Danielle xo

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.