Sagebrush is a C4 plant,while wheat is a C3 plant.Based on the type of photosynthesis that would occur in these plants in an arid (dry)southern region of the United States,which of the following is true?
A)Sagebrush is expected to outcompete wheat in the cooler spring and early summer seasons,whereas wheat outcompetes sagebrush in the hotter mid-to-late summer.
B)Wheat is expected to outcompete sagebrush in the cooler spring and early summer seasons,whereas sagebrush outcompetes wheat in the hotter mid-to-late summer.
C)Sagebrush produces 4 molecules of G3P per 'turn' of the Calvin cycle,while wheat produces only 3 molecules of G3P per "turn" of the Calvin cycle.
D)Sagebrush carries out the initial fixation of CO₂ into an organic acid only at night.
E)Wheat carries out the initial fixation of CO₂ into an organic acid only at night.

Question

Quizplus · Accepted Answer

C4 plants, like sagebrush, are adapted to arid environments with high temperatures and low water availability, while C3 plants, like wheat, are less efficient at photosynthesis in these conditions. Therefore, sagebrush is expected to outcompete wheat in the hotter mid-to-late summer when water availability is lower and temperatures are higher, while wheat is expected to outcompete sagebrush in the cooler spring and early summer seasons. Options C, D and E are not entirely related to the type of photosynthesis each plant perform.

Sagebrush Is a C4 Plant,while Wheat Is a C3 Plant