Question:

Arrange the following in increasing order on the basis of total amount of energy consumed at each trophic level per unit area per unit time:
A. Producer
B. Primary consumer
C. Secondary consumer
D. Tertiary consumer

Choose the correct answer from the options given below:

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Energy flow in an ecosystem follows the 10\% law: only about 10\% of the energy is transferred from one trophic level to the next. Hence, energy decreases as we move up.
Updated On: Apr 28, 2025
  • A < B < C < D
  • C < D < B< A
  • D < C < B < A
  • D < C < A < B
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The Correct Option is C

Solution and Explanation

As we move up the trophic levels in a food chain, the amount of energy available decreases due to loss of energy as heat during metabolic processes. Thus, the amount of energy consumed at each level is highest at the producer level and lowest at the tertiary consumer level. Therefore, the increasing order based on total energy consumption is: Tertiary consumer < Secondary consumer < Primary consumer < Producer
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