Question

Most leaves have the upper surface more green and shiny than the lower ones why?

Answer 1

The leaves are more green on the upper surface because of the presence of a large number of chloroplasts.

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Answer 2

Answer :

Most leaves have upper surface more green than lower one because the leaves contain more chlorophyll/ chloroplast on the leaf surface.

The shine on upper surface of leaf is attributed by the presence of thick cuticle.