Answer:
D. all of these
Explanation:
I just got it right in study island (:
the believe they move inside the membrane which is creating a gradient
Answer:
The first three are the correct choices. The last is wrong
Explanation:
Hope this helped Mark BRAINLEST!
Answer:
It is a quantitative observations
Id hav to go with A,reason i say that is, synthetic is man made..so it could b altered at anytime
