Question

why is upper part of leaf greener than lower part?​

Answer 1

Answer:

As a higher number of chloroplasts (organelles containing chlorophyll) are present on the upper surface of leaves as compared to its lower surface, the upper surface is more green than the lower one.

Answer 2

Answer:

As a higher number of chloroplasts (organelles containing chlorophyll) are present on the upper surface of leaves as compared to its lower surface, the upper surface is more green than the lower one.