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

Home » Past Questions » Biology » Waec » 2005 » 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

  • sunlight slows down water loss from the upper surface
  • the lower surface of the leaf has more stomata checkmark
  • Sunlight causes the stomata on the upper surface to close
  • stomata are not present on the upper surface of a leaf

The correct answer is: B

Explanation

No official explanation is available for this question at this time. Please check contributions posted by others below. If you can provide an explanation to help other student learn.
Previous Question Next Question

Leave A Comment