Which of the following is the most likely cause for future water shortages?

a.

global warming

b.

increased agriculture

c.

water pollution

d.

erosion

Environmental differences within ecosystems are generally caused by

One gene can influence trait(s). one trait can be determined by gene(s).

How are the testes and ovaries similar? a. both produce sex cells. b. both connect internal reproductive organs to the exterior. c. both transport sex cells from their site of production. d. both store mature sex cells.