5. Assertion : The energy passes to the herbivores does not come back to autotrophs.
Reason : The flow of energy is unidirectional.
Answers
The flow of energy is unidirectional. bcz the energy captured by the autotrophs does not revet back to the solar input and energy which passes to the herbivores does not comeback to the autotrophs.as energy moves progressively through various trophic levels, it is no longer available to previous level.
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The Assertion and Reason given are both correct statements, but the Reason does not correctly explain the Assertion.
The Assertion states that the energy passed to herbivores does not come back to autotrophs. This is true because energy is lost as it moves through the food chain. Autotrophs (producers) use solar energy to produce food through photosynthesis. This energy is transferred to herbivores (primary consumers) when they eat the plants. However, only a portion of the energy stored in the plants is transferred to the herbivores. This is because some energy is lost as heat during cellular respiration, and some energy is used for the herbivore's own growth and metabolism. When carnivores (secondary and tertiary consumers) eat herbivores, only a portion of the energy stored in the herbivores is transferred to the carnivores. Therefore, there is a net loss of energy as it moves up the food chain, and the energy passed to herbivores does not come back to autotrophs.
The Reason states that the flow of energy is unidirectional. This is also true, as energy flows in a one-way direction through the food chain, from the sun to autotrophs, to herbivores, to carnivores, and so on. This is known as the unidirectional flow of energy in an ecosystem.
However, the Reason does not fully explain the Assertion because it does not address why energy is not returned to autotrophs from herbivores. The unidirectional flow of energy is a consequence of the loss of energy that occurs as it moves through the food chain, but it does not explain why autotrophs do not receive energy back from herbivores. Therefore, the Reason does not correctly explain the Assertion.
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