KCET · BIOLOGY · STD 12 - 12. Ecosystem

Identify the incorrect statement from the following.

A Pyramid of biomass in sea is generally inverted as the biomass of fish far exceeds that of phytoplanktons.
B Pyramid of energy is mostly upright, but sometimes it may be inverted.
C Food chains are generally short with few trophic levels as only 10% of the energy is transferred to each trophic level from the lower trophic level.
D Pyramids of number and biomass may be either upright or inverted.

Verified Solution

Answer & Solution

Correct Answer

(B) Pyramid of energy is mostly upright, but sometimes it may be inverted.

Step-by-step Solution

Detailed explanation

(B) Pyramid of energy is mostly upright, but sometimes it may be inverted.,
Pyramid of energy is a graphic representation of amount of energy trapped per unit time and area in different trophic levels of a food chain with producers forming the base and top carnivores the tip.,
Pyramids of energy is always upright, since maximum energy content is present in the products. So, the incorrect statement is that pyramid of energy could be inverted.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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Column-I	Column-II
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List-I	List-II
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