OBJECTIVE LIFE SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In an average ecosystem, about how much energy is present in the organisms at a given trophic level compared to the organisms at the next higher trophic level?
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a tenth as much
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half as much
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twice as much
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ten times as much
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Explanation:
Detailed explanation-1: -Energy is passed up a food chain or web from lower to higher trophic levels. However, generally only about 10 percent of the energy at one level is available to the next level.
Detailed explanation-2: -Only about 10% of the energy is transferred from one trophic level to another. The rest is used for life processes of the organism and some is lost as heat.
Detailed explanation-3: -When green plants are consumed by the herbivores (primary consumers) most of the energy is liberated as heat to the environment, some amount goes into digestion and some energy used for growth and reproduction. Only 10% of the food eaten is turned into its own body and made available for the next level of consumers.
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