5. Siphon will fail to work if: A.The densities of the liquid in the two vessels are equal. B.The level of the liquid in the two vessels are at the same height. C.Both its limbs are of unequal length. D.The temperature of the liquids in the two vessels are the same.
Answer: Option A 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.
