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Question
The given figure shows four food chains with humans as a top consumer. Which two of these chains supply the maximum amount of energy to the human?
The given figure shows four food chains with humans as a top consumer. Which two of these chains supply the maximum amount of energy to the human?
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Solution
The correct option is B P and S
- In a food chain, energy decreases at each successive trophic level. According to Lindeman's law of trophic efficiency, the efficiency of energy transfer from one trophic level to the next is about 10%.
- The food chains P and Q have three trophic levels whereas food chains Q and R have four trophic levels.
- Hence, in food chains, Q and R, the energy that will be supplied to humans will be less as compared to the energy supplied in food chains P and S because in food chains Q and R, energy will decrease at each successive trophic level.
- So, maximum energy will be supplied to humans in food chains P and S.
Thus, the correct answer is option B.
- In a food chain, energy decreases at each successive trophic level. According to Lindeman's law of trophic efficiency, the efficiency of energy transfer from one trophic level to the next is about 10%.
- The food chains P and Q have three trophic levels whereas food chains Q and R have four trophic levels.
- Hence, in food chains, Q and R, the energy that will be supplied to humans will be less as compared to the energy supplied in food chains P and S because in food chains Q and R, energy will decrease at each successive trophic level.
- So, maximum energy will be supplied to humans in food chains P and S.
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