Question

do c4 and cam plants also use c3 photosynthesis?
o no, they do not use c3 photosynthesis.
o yes, both c4 and cam plants also use c3 photosynthesis.
o cam plants use c3 photosynthesis, while c4 plants do not.
o c4 plants use c3 photosynthesis, while cam plants do not.

Explanation:

C4 and CAM plants have modified forms of photosynthesis to reduce photorespiration and adapt to different environmental conditions. But they still use the C3 - Calvin - Benson cycle in the bundle - sheath cells (in C4 plants) or during the day (in CAM plants) to synthesize carbohydrates. The C3 cycle is the final stage where carbon is fixed into sugars.

Answer:

Yes, both C4 and CAM plants also use C3 photosynthesis.