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Life Processes — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceLife Processes2 Marks
Question
Why leaves become yellow in the absence of light?
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Answer

Actually, the green colour of the leaves is caused due to the presence of chlorophyll that reacts in the presence of sunlight, resulting in photosynthesis. As the leaves cannot produce foods due to the lack of sunlight, the plant becomes weaker and the leaves become yellow due to the degeneration of chlorophyll.

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