How is the process of carbon fixation in cam plants different from the process in c3 and c4 plants? a. cam plants require a larger exchange of gases in the atmosphere than c3 and c4 plants. b. cam plants are better adapted for moist, low light areas than c3 and c4 plants. c. cam plants conserve water by allowing transpiration to occur at night rather than the day like it does with c3 and c4 plants. d. all of the above