OBJECTIVE LIFE SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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As energy flows through a food chain/web, ____ % of energy is ____
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10, gained
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90, lost
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90, gained
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10, lost
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50, lost
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Explanation:
Detailed explanation-1: -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-2: -At each trophic level, only about 10% of energy can be passed on to the next level. This is because much of the energy that organisms consume is used to carry out their own bodily functions and growth.
Detailed explanation-3: -The other 90% is used for life processes, such as photosynthesis, respiration, reproduction, digestion; and ultimately transformed into heat energy before the organism is ever consumed. This pattern of energy transfer continues with each successive level of the pyramid.
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