What do scientists think life developed from? a. simple chemicals
b. oxygen
c. photosynthesis
d. a nucleus

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. which most likely affects the development of these traits? testes ovaries prostate gland vulva

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air