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.