The following statements about tundra are not true except
a. the tundra has a dense covering of trees.
b. there are two main categories of the tundra biome.
c. temperatures in the tundra range from extreme highs to extreme lows.
d. the tundra biome does not support animal life.

this is a good question! i'll do some research and come back when i have the answer!

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.