Science (086) — AI-generated practice question

Decomposers are microorganisms (bacteria and fungi) that break down the complex organic matter of dead plants and animals into simple inorganic substances, which are returned to the soil.

In their absence, dead organic matter would keep accumulating, nutrients would not be recycled back into the soil, and producers (plants) would be deprived of minerals — disrupting the entire ecosystem.

• 1 mark for defining decomposers (mention microorganisms + breaking down dead matter + releasing nutrients).
• 1 mark for the consequence — nutrient cycling stops, minerals are not returned to soil, producers cannot grow, ecosystem collapses.
• Examiners look for the key phrase "nutrient recycling" or equivalent. Avoid vague answers like "the environment will get dirty."