Home Biology Ecosystem Statement Based Questions Which of the following statements is/are not…
Biology Ecosystem Statement Based Questions Single Correct MCQ
Published on: August 14, 2026

Which of the following statements is/are not true?

(I) Below ground detritus constitutes leaf litter, dried plant parts, remains of animals, their droppings and excretions.

(II) Above ground detritus mainly constitutes dead roots, underground dead animals, etc.

(III) Decomposition completely disposes off the whole detritus.

(IV) Humus is rich in chitin and lignin.

A
(I), (II) and (III)
B
(I), (II) and (IV)
C
(I) and (II)
D
(II) and (III)

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Text Solution

Verified by Experts
The correct answer is:
B

Statements (I) and (II) are reversed because above-ground detritus includes leaf litter, while below-ground detritus includes roots and underground remains. Statement (IV) is also not true because humus is dark organic matter, not simply rich in chitin and lignin.

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