Homeostasious what is it and what does it mean

The third stage of cellular respiration is (2 points)

Speed is the ratio of the distance of an object moves to

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere