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mediumMCQUPTET Paper 2 (Maths & Science)2026Mathematics and Science
1 mark

Which one of the following plants keep its stomata open during the night and close during the day ?

  1. A
    Water lily
  2. B
    Cactus
  3. C
    Cycas
  4. D
    Orchid

Solution & Step-by-step Explanation

Desert plants like the Cactus utilize Crassulacean Acid Metabolism (CAM) photosynthesis. To conserve water in arid environments, they keep their stomata closed during hot daytime hours and open them at night to absorb carbon dioxide.

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Which one of the following plants keep its stomata open during the night and close during the day ?
A
Water lily
B
Cactus
C
Cycas
D
Orchid

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