Protists that form plasmodium are

Options

A. Euglenoids
B. Slime moulds
C. Protozoans
D. Diatoms

Answer

To answer the question "Protists that form plasmodium are," we need to analyze the options provided and determine which group of protists is associated with the formation of plasmodium.

### Step-by-Step Solution:

1. **Understand the term "plasmodium":**
- Plasmodium refers to a stage in the life cycle of certain organisms, particularly in slime molds. It can also refer to the genus of parasites that cause malaria in humans, but in the context of protists, we focus on the slime molds.

2. **Evaluate the options:**
- **Euglenoids:** These are protists that have characteristics of both plants and animals. They are primarily photosynthetic and do not form plasmodium.
- **Slime molds:** These are a group of protists that can exist as single cells but can aggregate to form a multicellular structure known as plasmodium. They are known for their role as decomposers in the ecosystem.
- **Protozoans:** This is a broad category that includes various single-celled organisms. While some protozoans can be parasitic, they do not form plasmodium in the context of slime molds.
- **Diatoms:** These are a type of algae and are known for their silica cell walls. They are part of the phytoplankton and do not form plasmodium.

3. **Identify the correct answer:**
- Based on the evaluation, slime molds are the only group among the options that can form plasmodium. Therefore, the correct answer is **slime molds**.

### Final Answer:
The protists that form plasmodium are **slime molds**.