5. Stomata open at night in A.CAM plants B.C3 plants C.C4 plants D.Succulent plants
Solution: In CAM plants, stomata are open during the night and closed during day time. This is an adaptation of cutting transpiration loss of water. CAM plants grow in deserts and are exposed to high temperatures.Their stomata are open during the night for carbon dioxide uptake but closed during the day to prevent water loss. Thus, the correct answer is option C.
