Competition for food cannot occur. I NEED THIS ANSWER ASAP. THXS A. Between two population.
B. Among members of the same population.
C. Among population whose niches over lap.
D. Between animals from two different ecosystem.

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.