Choose the incorrect statement regarding decomposer:-

Options

A. They may be prokaryotes or eukaryotes
B. They may be unicellular or multicellular
C. They convert inorganic into organic compounds
D. They play a great role in ecology

Answer

### Step-by-Step Solution

1. **Understanding Decomposers**: Decomposers are organisms that break down complex organic substances into simpler inorganic substances. This process is known as decomposition.

2. **Role of Decomposers**: They play a crucial role in the ecosystem by recycling nutrients from dead and decaying matter back into the soil, which is essential for plant growth.

3. **Types of Decomposers**: Decomposers can be classified into two main categories based on their cellular structure:
- **Prokaryotes**: This includes organisms from the kingdom Monera, primarily bacteria, which are unicellular and play a significant role in decomposition.
- **Eukaryotes**: This includes fungi, which can be unicellular (like yeast) or multicellular (like mushrooms). Fungi also contribute to the breakdown of organic matter.

4. **Evaluating the Statements**: The question asks to identify the incorrect statement regarding decomposers. The statements provided are:
- They may be prokaryotes and eukaryotes.
- They may be unicellular or multicellular.
- They convert inorganic into organic compounds.
- They play an important role in ecology.

5. **Identifying the Incorrect Statement**:
- The first statement is correct as decomposers can be both prokaryotic (bacteria) and eukaryotic (fungi).
- The second statement is also correct as decomposers can be unicellular (like bacteria and yeast) or multicellular (like mushrooms).
- The third statement is incorrect because decomposers convert complex organic compounds into simpler inorganic compounds, not the other way around.
- The fourth statement is correct as decomposers play a vital role in ecological balance.

6. **Conclusion**: The incorrect statement regarding decomposers is that they convert inorganic into organic compounds.

### Final Answer
The incorrect statement regarding decomposers is: **They convert inorganic into organic compounds.**

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