Rocks containing many dark silicate minerals and plagiarists feldspar have a composition

What causes temperature extremes in the desert

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.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above