Phagotrophic nutrition is present in

Options

A. dinoflagellates
B. euglenoids
C. slime molds
D. diatoms

Answer

To determine which organism exhibits phagotrophic nutrition, we can analyze the options provided:

1. **Dinoflagellates**: These are primarily algae and are known for their autotrophic nutrition, as they perform photosynthesis to produce their own food. Some dinoflagellates can also exhibit heterotrophic behavior, but they are not primarily phagotrophic.

2. **Euglena**: Euglena is a unique organism that can perform both autotrophic and heterotrophic nutrition. It can photosynthesize when light is available but can also absorb nutrients from its environment in the absence of light. However, it does not primarily rely on phagotrophic nutrition.

3. **Slime molds**: Slime molds are known for their phagotrophic nutrition. They can engulf food particles through a process called phagocytosis, where they surround and digest the food. This is a clear example of phagotrophic nutrition.

4. **Diatoms**: Diatoms are also autotrophic organisms, primarily relying on photosynthesis to create their own food. They do not exhibit phagotrophic nutrition.

Based on this analysis, the organism that exhibits phagotrophic nutrition is **slime molds**.

### Step-by-Step Solution:
1. **Identify the options**: The options given are dinoflagellates, Euglena, slime molds, and diatoms.
2. **Analyze each option**:
- **Dinoflagellates**: Primarily autotrophic.
- **Euglena**: Can be both autotrophic and heterotrophic, but not primarily phagotrophic.
- **Slime molds**: Known for phagotrophic nutrition through phagocytosis.
- **Diatoms**: Autotrophic, relying on photosynthesis.
3. **Determine the correct answer**: Slime molds are the only organisms from the options that exhibit phagotrophic nutrition.

### Final Answer:
Phagotrophic nutrition is present in **slime molds**.