NEET Botany Food Chains & Webs MCQ Question
Consider a diagram showing a simplified food web with primary producers, primary consumers, and secondary consumers. If the primary producers capture 2% of the photosynthetically active radiation (PAR), what is the primary reason for the unidirectional flow of energy from the sun to these producers and then to consumers?
Energy is lost as heat at each trophic level.
Energy is converted back to sunlight by decomposers.
Energy is stored permanently in plant biomass.
Energy is recycled indefinitely within the food web.
Correct Answer
Detailed Explanation
The unidirectional flow of energy is due to energy being lost as heat at each trophic level, as captured in the NCERT context about energy flow in ecosystems.
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