Photosynthesis Question 69
69. Stomata of CAM plants
[2003]
(a) never open
(b) are always open
(c) open during the day and close at night
(d) open during the night and close during the day
Show Answer
Answer : d
Hints & Solution
(d) To conserve water, the stomata of CAM plants open during night to take up $CO_2$ and store it in the form of malic acid which is utilised during the time of photosynthesis.
