Reef-building corals are cnidarians that are characterized by: Group of answer choices Having both a polyp and medusa stage. Lacking nematocysts. Havi

trachea, alveoli, lung capillaries, arteries

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

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.