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What are trophic levels? Give an example of a food chain and state the different trophic levels in it.

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The various steps in food chain at which transfer of food energy takes place are called trophic levels. Example: Food chain operating in a grassland. Grass → Insects → Frogs → Snakes

 1. Grass → 1st trophic level

 2. Insects → 2nd trophic level

3. Frogs → 3rd trophic level

 4. Birds → 4th trophic level

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