Home Biology Ecosystem Skill Builder Which of the following statements best descr…
Biology Ecosystem Skill Builder Single Correct MCQ
Published on: August 21, 2026

Which of the following statements best describes the role of both leaching and detritivores like earthworms in the decomposition cycle in a terrestrial ecosystem?

A
Both are involved in the enzymatic breakdown of organic matter.
B
Both contribute to the physical breakdown of detritus into smaller particles.
C
Leaching leads to the precipitation of inorganic nutrients, while detritivores contribute to physical fragmentation.
D
Leaching and detritivores both make inorganic nutrients readily available for plant uptake.

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The correct answer is:
C

Leaching leads to the precipitation of inorganic nutrients, while detritivores contribute to physical fragmentation. Leaching moves water-soluble nutrients down into the soil, making them unavailable as they precipitate as salts. Detritivores like earthworms are involved in fragmentation, which is the physical breakdown of organic matter.

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