Inorganic Chemistry Chapters for NEET 2025 Preparation - Chapter-wise Weightage

10 Percent Law of Energy Flow MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

Quick Facts

10 Percent Law of Energy Flow is considered one of the most asked concept.
7 Questions around this concept.

Solve by difficulty

MEDIUM

In which ecosystem is the autotroph-fixed energy likely to reach the primary carnivore level in the shortest time?

Temperate deciduous forest

Grasslands

Ocean

Tropical rainforest

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Assertion: The 10 percent law of energy flow is an absolute rule that applies to all ecosystems.

Reasoning: The 10 percent law of energy flow is a general rule that applies to most ecosystems. However, there are some ecosystems where the efficiency of energy transfer between trophic levels may be higher or lower than 10 percent due to various factors such as the trophic structure of the ecosystem, biodiversity, and climate conditions.

Both assertion and reasoning are true, and the reasoning is the correct explanation of the assertion.

Both assertion and reasoning are true, but the reasoning is not the correct explanation of the assertion.

The assertion is true, but the reasoning is false.

Both assertion and reasoning are false.

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Concepts Covered - 1

10 Percent Law of Energy Flow

The number of trophic levels in the grazing food chain is restricted as the transfer of energy follows 10 percent law – only 10 percent of the energy is transferred to each trophic level from the lower trophic level.
In nature, it is possible to have so many levels – producer, herbivore, primary carnivore, secondary carnivore in the grazing food chain.
Is there any such limitation in a detritus food chain?
- The detritus food chain starts from the decomposition of organic matter and the nutrients and energy released flows to other trophic levels in step by step manner.
- Because there is a partial digestion of food to obtain chemical energy by microbes, a lot of organic nutrients are excreted in the form of waste.
- But according to the 10% law of energy transfer the detritus food chain is also restricted till 4 to 5 trophic levels. They are usually even less because the energy production is low.