When a population is stable over a long period of time, with only small changes occurring in the gene pool, the population is in a state of equilibrium.

Gradualist Baically B

Explanation:

I just did it on USA Testprep

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.

i think the answer is a.keratin is the pigment responsible for skin color.