Consider the following statements. I. In a food chain, one organism holds only one position. II....

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Consider the following statements.
I. In a food chain, one organism holds only one position.
II. In a food chain the flow of energy can be easily calculated.
III. In food chain, competition is limited to the members of same trophic level.
Which of the statements given above are correct?
(a) I, II and III
(b) I and II
(c) I and III
(d) II and III
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