Decomposer protist are

Options

A. Diatoms
B. Dinoflagellates
C. Slime moulds
D. Euglenoid

Answer

To answer the question "Decomposer protist are," we need to analyze the options provided and identify which one represents a decomposer.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- A) Diatoms
- B) Dinoflagellates
- C) Slime molds
- D) Euglenoids

2. **Evaluate Diatoms**:
- Diatoms are primarily known as photosynthetic producers. They play a crucial role in the marine food chain as primary producers.
- **Conclusion**: Diatoms are not decomposers. We can eliminate option A.

3. **Evaluate Dinoflagellates**:
- Dinoflagellates are mostly autotrophic, meaning they produce their own food through photosynthesis. While some can be parasitic or symbiotic, they are not primarily known as decomposers.
- **Conclusion**: Dinoflagellates are not decomposers. We can eliminate option B.

4. **Evaluate Slime Molds**:
- Slime molds are eukaryotic organisms that can live freely or in groups. They are known to feed on dead or decaying organic matter.
- **Conclusion**: Slime molds are indeed decomposers. This makes option C a strong candidate.

5. **Evaluate Euglenoids**:
- Euglenoids are unicellular eukaryotes that are primarily phototrophic, meaning they can perform photosynthesis. They can exhibit facultative saprophytic nutrition, but they are not primarily decomposers.
- **Conclusion**: Euglenoids are not considered decomposers. We can eliminate option D.

6. **Final Answer**: After evaluating all options, the only organism that fits the description of a decomposer protist is **C) Slime molds**.