Answer:
Proteins is a macromolecule that helps to send signals
I believe it's aerobic exercise.
A. Intracellular
The pathway water takes to reach the xylem cells in which it passes through each cell of the cortex is the intracellular route.
I believe it would be mesentery
<span>The more similar the embryonic development of two species, the more closely they are related.</span>
