George has several plants in his garden. once in a while, he adds fertilizer to the soil. the leaves absorb the nutrients in the fertilizer and look healthy. if a cell is compared to a plant, which organelle transport fertilizer from the soil to the leaf?
a)lysosome
b)mitochondrion
c)vacuole
d)vesicle

The answer is D.

A vesicle is a compartment in the cell surrounded by a bilipid layer membrane. When the vesicle gets in touch with the outer cell membrane, it membrane fuses with that of the cell membrane to form an invagination where  the fertilizer is taken up. The vesicle then encloses the nutrients by endocytosis and resumes inside the cell transporting the nutrients into the cells.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

digestion

it excretes wastes