Question:
Select the INCORRECT statement about Opuntia:
Select the INCORRECT statement about Opuntia:
Show Hint
In Opuntia the green fleshy stem does photosynthesis, not the spines.
Updated On: Nov 12, 2026
- Leaves are reduced to spines
- Leaf spines perform the function of photosynthesis
- Opuntia show CAM pathway
- Stomata remains closed during day time
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Opuntia is a desert plant with adaptations that reduce water loss.
Step 2: Check the true statements
Its leaves are reduced to spines to reduce transpiration. It follows the CAM pathway, in which stomata open at night and remain closed during the day.
Step 3: Find the false statement
Photosynthesis is carried out by the flattened, green, fleshy stem (phylloclade) and not by the spines. So option (B) is incorrect.
Final Answer:
The statement that leaf spines photosynthesise is incorrect. \[ \boxed{\text{(B) }\text{Leaf spines perform the function of photosynthesis}} \]
Opuntia is a desert plant with adaptations that reduce water loss.
Step 2: Check the true statements
Its leaves are reduced to spines to reduce transpiration. It follows the CAM pathway, in which stomata open at night and remain closed during the day.
Step 3: Find the false statement
Photosynthesis is carried out by the flattened, green, fleshy stem (phylloclade) and not by the spines. So option (B) is incorrect.
Final Answer:
The statement that leaf spines photosynthesise is incorrect. \[ \boxed{\text{(B) }\text{Leaf spines perform the function of photosynthesis}} \]
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