In a pyramid of energy, if the energy at a specific trophic level is 1,000 J, the amount of energy available for the next higher trophic level would be:
Correct answer: B. 100 J
- A. 10 J
- B. 100 J
- C. 1,000 J
- D. 10,000 J
Explanation
In an energy pyramid, energy decreases as it moves up trophic levels due to the 10% rule, which states that only about 10% of the energy is transferred to the next level. Therefore, if there is 1,000 J at a specific trophic level, 100 J will be available for the next level.Option A is incorrect because it assumes a 1% transfer rate. Option C is incorrect because it suggests no energy loss, which contradicts the natural energy flow in ecosystems. Option D is incorrect because it erroneously suggests an increase in energy, which violates the law of conservation of energy.
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About Ecosystems
An ecosystem consists of organisms interacting with one another and with abiotic factors such as light, water, soil and temperature. The topic covers populations and communities, food chains and webs, trophic levels, ecological pyramids, energy flow, nutrient cycles and ecological succession.
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