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An absorption spectrum shows

(a) the rate of photosynthesis at different wavelengths Your answer
(b) the amount of O₂ released at different temperatures Your answer
(c) the movement of electrons in the Z scheme Your answer
(d) the amount of light of different wavelengths absorbed by a pigment Correct

Your answer: Correct answer: (d)

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Explanation

Why (d) is correct

An absorption spectrum shows how much light of each wavelength a pigment absorbs.

Why the other options are wrong

(a) · your answer The rate of photosynthesis at different wavelengths is the action spectrum.
(b) · your answer O₂ release at different temperatures is not a spectrum.
(c) · your answer The Z scheme shows electron flow, not light absorption.

NCERT point: The action spectrum of photosynthesis closely matches the absorption spectrum of chlorophyll a.

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