SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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energy flows in one direction, and nutrients recycle
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energy forms chemical compounds, and nutrients are lost as heat
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nutrients flow in one direction, and energy recycles
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energy is limited in the biosphere, and nutrients are always available
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Detailed explanation-1: -Nutrients recycle while energy flows in one direction.
Detailed explanation-2: -Therefore, the energy moves through various trophic levels in a food chain. In most natural ecosystems energy comes from the sun, it is consumed by producers. It is then passed on to successive trophic levels in the form of food. Hence, energy flows from the prey to the predator, not in the reverse direction.
Detailed explanation-3: -The flow of energy in the ecosystem is unidirectional because the energy lost as heat from the living organisms of a food chain cannot be reused by plants in photosynthesis. During the transfer of energy through successive trophic levels in an ecosystem, there is a loss of energy all along the path.
Detailed explanation-4: -The energy flow takes place via the food chain and food web. During the process of energy flow in the ecosystem, plants being the producers absorb sunlight with the help of the chloroplasts and a part of it is transformed into chemical energy in the process of photosynthesis.