A faster colour change of a dry cobalt chloride paper affixed to the lower surface of a leaf than the upper one, indicates that
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- A Sunlight slows down water loss from the upper surface
- B The lower surface of the leaf has more stomata
- C Sunlight causes the stomata on the upper surface to close
- D Stomata are not present on the upper surface of a leaf
Correct Answer: Option B
Explanation:
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