The united states uses which resource for the majority of its energy consumption

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis

Which are reasons cells undergo cell division?

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%