Question

Assertion: Greater number of individuals are present in lower trophic levels.
Reason: The flow of energy is unidirectional.

Answer 1

Answer:

both assertion and reason are correct

but reason is not the correct explanation of assertion

Answer 2

Assertion  is True

Reason is also True

Hence, Assertion and Reason both are true.

Reason is not the correct explanation of assertion.

Detailed Explanation:

• At lower trophic levels, the amount of energy present is more as compared to higher trophic levels because according to the 10% law, only 10% of the actual energy is passed from one trophic level to the other trophic level. Hence, it is obvious that more organisms are present at the lower trophic level. Thus, assertion is true.
• The energy released at higher trophic levels cannot be used by individuals present at lower trophic levels because some energy is lost in the form of heat which is not reusable. Hence, the energy flows from the lower trophic level to the higher trophic level in one direction only.

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