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Ans: (d) Food Chain length is dependent upon productivity.
The productivity space hypothesis states that the length of the food chain is directly dependent on two factors – the size of the ecosystem and a measure of productivity. Option B may seem correct but it is inverted and the hypothesis says that the food chain length is dependent on ecosystem size and not the other way around
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The productivity hypothesis postulates that... a. Food chain length is dependent upon the number of species...
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