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Which gas is required for photosynthesis?

Answer and explanation

Correct answer: Carbon dioxide

Photosynthesis requires carbon dioxide as the carbon source for making carbohydrate. In green leaves, carbon dioxide enters mainly through stomata, while water is supplied by the roots and light energy is captured by chlorophyll. Oxygen is released as a product rather than being the required carbon source. Nitrogen is important for plant proteins but is not the gas directly used to form glucose. Hence option A is correct.

Related tags

PhotosynthesisCarbon DioxidePlant NutritionLife ProcessesWorld Of LivingScienceClass 10 Mcq

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