A symbiotic protist is

Options

A. Plasmodium
B. Lophomonas
C. Fuligo
D. Trypanosoma.

Answer

To determine which of the given options is a symbiotic protist, let's analyze each option step by step:

### Step 1: Understand the term "symbiotic protist"
A symbiotic protist is an organism that lives in a close, often long-term interaction with another organism, where both parties benefit from the relationship.

### Step 2: Analyze the options
1. **Plasmodium**: This is known to be a parasitic protist that causes malaria in humans. It obtains nutrients from its host, which means it does not have a symbiotic relationship.

2. **Lophomonas**: This protist is known to live in the intestines of termites. It helps in the digestion of cellulose, which is beneficial for both the protist and the termite, indicating a symbiotic relationship.

3. **Fulego**: This is a slime mold that exhibits saprobic nutrition. It feeds on decaying organic matter, which does not indicate a symbiotic relationship.

4. **Trypanosoma**: This is another parasitic protist that causes diseases such as sleeping sickness. Like Plasmodium, it derives nutrients from its host, which means it is not symbiotic.

### Step 3: Conclusion
From the analysis, the only option that represents a symbiotic protist is **Lophomonas**.

### Final Answer
The correct answer is **Lophomonas**.

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