Multiple choice

What percent of energy present at one trophic level is passed on to the next trophic level?

  1. 1

  2. 2

  3. 5

  4. 10
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

According to the 10% rule in ecology, only about 10% of energy is transferred from one trophic level to the next. The rest is lost as heat or used for metabolic processes. This principle explains why food chains are limited to 3-4 trophic levels.

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