Which one of the following statements is correct ........

Environment and Ecology (Easy) Environment

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Which one of the following statements is correct?

The relative loss of energy due to respiration is lower from higher trophic levels.

Species at higher trophic levels appear to be less efficient in using their available food supply.

Higher trophic levels tend to be less discrete than the lower ones.

Food chains tend to be reasonably long.

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Explanation:

The relative loss of energy increases in successive trophic levels. Primary consumers use 10% of the energy stored in plants. Secondary and tertiary consumers transfer 20% of the energy from their own bodies so they are more efficient. In going from lower to higher trophic levels, energy transfers are insufficient thus making the food chains limited to only 4-5 trophic levels. Higher trophic levels are less discrete due to their less specialised food habits.