Question

Q3. Give reasons for the following:
(a) Chloroplasts are more in number on the
upper surface of leaf as compared to the
lower surface.

Answer 1

Answer:

The upper surface of leaf is greener than its lower surface because of the presence of mesophyll cells which contains chlorophyll. Due to more amount of chlorophyll on the upper surface more light energy is trapped hence more amount light of green wavelength is reflected.

Answer 2

Explanation:

The palisade tissue has more chloroplasts compared to other tissues. This is the position of light reaction. The higher concentration of chloroplasts is the reason that the topmost surface of the leaf is darker compared to the lower surface.

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