Question
GSEasyPrelims 2013Environment & Ecology

With reference to food chains in ecosystems, consider the following statements :

  1. A food chain illustrates the order in which a chain of organisms feeds upon each other.
  2. Food chains are found within the populations of a species.
  3. A food chain illustrates the numbers of each organism which are eaten by others.

Which of the statements given above is/are correct?

Explanation

Statement 1 is correct: A food chain shows the linear sequence of organisms through which energy and nutrients pass, from producer → herbivore → carnivore → decomposer.

Statement 2 is incorrect: Food chains are not found within the populations of a species, because technically, the food chain is the sequence of organisms through which the energy flows.

Statement 3 is incorrect: A food chain does not show the number of organisms, it only shows the feeding relationship and energy flow.

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