Given these characteristics of a transport process: 1. moves with the concentration gradient 2. does not require energy 3. requires carrier molecules...

Given these characteristics of a transport process:

1. moves with the concentration gradient

2. does not require energy

3. requires carrier molecules

Which of these processes is described?

A)                diffusion

B)                facilitated diffusion

C)                active transport

D)                exocytosis

E)                phagocytosis