ECOLOGY
ORGANISMS AND THE ENVIRONMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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All living organisms respire.
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Food chains always begin with green plants.
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Plants are called producers and animals consumers.
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There are very few food chains with more than five organisms.
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Detailed explanation-1: -At each level, energy is lost directly as heat or in the form of waste and dead matter that go to the decomposers. Eventually, the decomposers metabolize the waste and dead matter, releasing their energy as heat also. Why does so much energy exit the food web between one trophic level and the next?
Detailed explanation-2: -Energy decreases as it moves up trophic levels because energy is lost as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level.
Detailed explanation-3: -At each step up the food chain, only 10 percent of the energy is passed on to the next level, while approximately 90 percent of the energy is lost as heat.
Detailed explanation-4: -It is rare to find food chains that have more than four or five links because the loss of energy limits the length of food chains. At each trophic level, most of the energy is lost through biological processes such as respiration or finding food.