🔬 Biology · Ecosystem · NEET

If the energy entering the producer level of a pond is 1000 units, applying the ten percent law, the energy reaching the secondary consumers would be about:

Answer: 10 units.

Correct answer: B. 10 units

Explanation: Only about ten percent transfers per level: 1000 to 100 at herbivores, then 100 to 10 at secondary consumers.

Energy pyramid showing a simple food chain (producer to herbivore to carnivore) with energy decreasing roughly tenfold at each trophic level.

Concept context

Ecosystems, food chains, energy flow, nutrient cycles, biodiversity, and conservation.