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State PCS PYQPrelims 2019

UPPCS · Question 134

The amount of energy during transfer from one trophic level to another in an ecosystem

  1. Increases
  2. Decreases
  3. Remains constant
  4. May increase or decrease
Show answer & explanation

Answer: (B) Decreases

Explanation

Energy decreases at each trophic level. Only about 10% passes to the next level (Lindeman's 10% law); the rest is lost as heat in respiration.