Question

leaves are less green on the lower surface why

Answer 1

The leaves are less green on the lower surface because of the less or absence of palisade cells and thick cuticle layer.

Answer 2

Hii mate

Here is Ur answer

This is because the upper surface of a leaf is more exposed to the sun as compared to the lower surface. ... Therefore, the upper surface of the leaf is covered with a thicker cuticle as compared to the lower surface. Hence, the upper surface of the leaf is shinier than the lower surface.

Hope it will help you....