What are trophic levels ? Why do different food chains in an ecosystem not have more than four to five trophic levels ? Give reason.

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TextTrophic Levels in Food ChainCBSE PYQ

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Which of the following groups do not constitute a food chain ? (i) Wolf, rabbit, grass, lion (ii) Plankton, man, grasshopper, fish (iii) Hawk, grass, snake, grasshopper, frog (iv) Grass, snake, wolf, tiger

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Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions :

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A food chain will be more advantageous in terms of energy if it has

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