1. Increasing concentration of toxic chemical in the food chain is called

  • Option : B
  • Explanation : Increasing concentration of toxic chemical in the food chain is called biomagnification. In simple terms, it means increased in toxicity at successively higher levels in a food chain.

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2. Competition for food, light and space is most severe between

  • Option : A
  • Explanation : Competition for food, light and space is sever mostly in closely related species growing in the same habitat.

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