Biology

A faster colour change of a dry cobalt chloride paper affixed to the lower surface…

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: Option B
Explanation