Provide two common decomposers and the role each plays in the ecosystem.

Provide two common decomposers and the role each plays in the ecosystem.

• A. Plants and fungi; they break down dead material and recycle nutrients.
• B. Bacteria and algae; they produce oxygen during decomposition.
• C. Protozoa and bacteria; they break down dead material and recycle nutrients.
• D. Bacteria and fungi; they break down dead material, recycle nutrients, and help soil formation.

Answer: (D)

Decomposers break down dead material and recycle nutrients, keeping the nutrient cycle moving and supporting soil health. Bacteria and fungi are the main decomposers in most ecosystems. Fungi release enzymes that break down tough plant matter such as cellulose and lignin, releasing nutrients trapped in those materials. Bacteria also decompose a wide range of organic compounds, mineralizing them into inorganic forms like ammonium and nitrates that plants can absorb. This activity adds organic matter to the soil, forming humus and improving soil structure, which helps with water retention and aeration. By recycling nutrients, they ensure essential elements are available for plants and other organisms, sustaining the food web. Other options are less accurate because plants aren’t decomposers; they mainly produce energy through photosynthesis rather than breaking down dead matter. Algae are primarily photosynthetic and don’t play a leading role in decomposition, and protozoa, while involved in microbial food webs, do not decomposed dead material as their primary function in the same way bacteria and fungi do.

Decomposers break down dead material and recycle nutrients, keeping the nutrient cycle moving and supporting soil health. Bacteria and fungi are the main decomposers in most ecosystems. Fungi release enzymes that break down tough plant matter such as cellulose and lignin, releasing nutrients trapped in those materials. Bacteria also decompose a wide range of organic compounds, mineralizing them into inorganic forms like ammonium and nitrates that plants can absorb. This activity adds organic matter to the soil, forming humus and improving soil structure, which helps with water retention and aeration. By recycling nutrients, they ensure essential elements are available for plants and other organisms, sustaining the food web.

Other options are less accurate because plants aren’t decomposers; they mainly produce energy through photosynthesis rather than breaking down dead matter. Algae are primarily photosynthetic and don’t play a leading role in decomposition, and protozoa, while involved in microbial food webs, do not decomposed dead material as their primary function in the same way bacteria and fungi do.