Which of the following processes can be used to bring nutrients into a cell against a concentration gradient?
A. Active transport.
B. Facilitated diffusion.
C. Passive diffusion.
D. Active transport and facilitated diffusion.
Answer: A
Which of the following processes can be used to bring nutrients into a cell against a concentration gradient?
A. Active transport.
B. Facilitated diffusion.
C. Passive diffusion.
D. Active transport and facilitated diffusion.
Answer: A