They may be prokaryotes or eukaryotes is Correct → Examples include bacteria (prokaryotes) and fungi (eukaryotes).

They may be unicellular or multicellular is Correct → Bacteria are unicellular, while fungi can be multicellular.

They convert inorganic into organic compounds is Incorrect → Decomposers actually break down complex organic matter into simpler inorganic substances (nutrient cycling), not the reverse.

They play a great role in ecology is Correct → They are essential for recycling nutrients in ecosystems.

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