A faster colour change of a dry cobalt chloride paper affixed to the lower surface...
BIOLOGY
WAEC 2005
A faster colour change of a dry cobalt chloride paper affixed to the lower surface of a leaf than the upper one, indicates that
- 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: B. the lower surface of the leaf has more stomata
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