Which of the following is true of the calvin cycle? a. energy is destroyed during the cycle b. the cycle converts carbon into energy c. carbon atoms are destroyed during the cycle d. the total number of carbon atoms remains constant

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