Maintaining a rich variety of genetic material that may lead to discoveries useful to humans can be ensured by 1.preserving biodiversity
2.increasing cloning
3.asexual reproduction
4.selective breeding

The answer would be 1. Preserving biodiversity

Explanation:

Since you said "Maintaining a rich variety of genetic material..." then the three other responses wouldn't make sense because they all would have identical or similar genetics.

the answer is d. chordata

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.