January 2026

Breathing and Exchange of Gases | Board Level Question and Answer-NCERT

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One Mark Question and Answer Ans: Oxygen is utilized to indirectly break down simple molecules like glucose to derive energy for various activities. Ans: Breathing is the process of exchange of oxygen from the atmosphere with carbon dioxide produced by the cells. Ans: They exchange gases by simple diffusion over their entire body surface. Ans: […]

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Photosynthesis in Higher Plants | Board Level Question and Answer-NCERT

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One-mark Questions and Answers:- Q1: Define photosynthesis. Ans: Photosynthesis is a physico-chemical process by which green plants use light energy to drive the synthesis of organic compounds. Q2: Why are green plants called autotrophs? Ans: Green plants are called autotrophs because they make or synthesize the food they need through photosynthesis. Q3: What conclusion was

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