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Which gas is used by green plants during photosynthesis?

Answer and explanation

Correct answer: Carbon dioxide

Direct answer: C, carbon dioxide. During photosynthesis, green plants use light energy captured by chlorophyll to make glucose from carbon dioxide and water. Oxygen is released as a major product. The simplified idea is: carbon dioxide + water, with light energy, produces glucose + oxygen. Option A is not correct for this question: nitrogen is essential for plant growth and is used in nitrogen compounds, but it is not the gas directly taken in as the carbon source for photosynthesis. Options B and D are wrong because argon and helium are chemically unreactive gases and are not photosynthetic raw materials. The important distinction is between a nutrient needed by plants and the gas directly used in this process. Plants generally obtain carbon dioxide from the air through stomata in their leaves.

Related tags

PhotosynthesisCarbon DioxideGreen PlantsPlant BiologyLight And Dark ReactionsPhotosynthesis In Higher PlantsBiologyClass 11 Mcq

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