D.
A fixed allele is homozygous within a population so D should be the correct answer.
Hope this helps!
Explanation:
multicellular organisms rely on mitochondria & getting food supplies by bloodstream...
A plant cell refers to the plant cell as a hole.
Cell organelles are organelles inside the cell.
So the difference between a plant cell and cell organelles, is cell organelles are inside the cell while plant cells refers to the hole cell.
B. the rate will decrease. plants need carbon dioxide
