What happens to the carbon dioxide produced by cellular respiration? a. it is reused by the body as glucose. b. it is excreted from the body as liquid waste. c. it is excreted from the body as solid waste. d. it is breathed out of the body by the lungs.

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit