The movement of molecules across a cell membrane using a membrane transport protein and cellular ATP energy, generally moving the molecules from a region of low to high concentration, is called

Why is excretion necessary to maintain homeostasis?

The color of the fur is the genotypephenotype. the genetic combination of alleles that determine the fur color is called the genotypephenotype.

Which of these would most likely be a stimulus that would cause the body to initiate feedback mechanisms a.) normal body temperature in an arctic environment b.) normal boy temperature in a tropical environment c.)light physical activity d.)low blood sugar