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The following are a few statements on shade leaves vis-à-vis sun leaves in tree species:A. Higher amount of chlorophyll per dry weight B. Lower densit
Question

The following are a few statements on shade leaves vis-à-vis sun leaves in tree species:

A. Higher amount of chlorophyll per dry weight
B. Lower density of stomata
C. Thicker leaves
D. Lower rates of dark respiration per unit area

Which one of the following combinations of above statements is correct?

A.

A and D

B.

B and C

C.

A, B and D

D.

B and D

Correct option is C

Explanation-

Statement A: Higher amount of chlorophyll per dry weight  - Correct
Shade leaves have more chlorophyll per unit dry weight to efficiently capture the limited light available in shaded conditions. This helps maximize photosynthesis in low-light environments.
Statement B: Lower density of stomata  -  Correct
Shade leaves often have fewer stomata, as they transpire less due to lower light intensity and reduced temperature. Reduced stomatal density also helps conserve water.
Statement C: Thicker leaves  -  Incorrect
Shade leaves are typically thinner than sun leaves. Sun leaves are thicker due to more developed palisade layers to handle high light intensity.
Statement D: Lower rates of dark respiration per unit area   -   Correct
Shade leaves generally show lower dark respiration rates, helping conserve energy in low-light environments.

Correct Combination:
A, B, and D — which matches Option c

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