Answer: It's not blocked
https://www.khanacademy.org/science/high-school-biology/hs-human-body-systems/hs-body-structure-and-homeostasis/a/tissues-organs-organ-systems
Energy from ATP causes a transport protein to change shape, binding substances on one <span>side of the membrane, and releasing them on the other.</span>
Has normal (2n) amount of DNA;
Has twice (4n) the normal amount of DNA
Answer:
D
Explanation:
The atmosphere is not an eycosystem
