The rock and fossil record shows that

a.

the earth has not changed very much over the course of its history.

b.

all of the changes during earth's history have been very sudden.

c.

both gradual and sudden changes have occurred during earth's history.

d.

all of the changes during earth's history have been slow and gradual.

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

The third stage of cellular respiration is (2 points)

(6.02 mc)what affect do marine protected areas have on environmental quality? they increase environmental quality by preventing resource overuse. they increase environmental quality by adding new species. they decrease environmental quality by removing all human activity. they decrease environmental quality by adding recycling facilities.