Question

why is the upper part of leaf more green in colour? ​

Answer 1

For example, the presence of a pigment chlorophyll imparts a green colour to the leaves of plants. 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:

For example, the presence of a pigment chlorophyll imparts a green colour to the leaves of plants. 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.