Mixotrophic nutrition is present in

Options

A. slime moulds
B. Euglenoids
C. diatoms
D. dinoflagellates

Answer

To address the question regarding mixotrophic nutrition, we need to identify organisms that exhibit this type of nutrition. Mixotrophic nutrition is a mode of nutrition where an organism can obtain energy and nutrients through both autotrophic (photosynthesis) and heterotrophic (consuming other organisms) means.

### Step-by-Step Solution:

1. **Understanding Mixotrophic Nutrition**:
- Mixotrophic organisms can perform photosynthesis and also consume organic matter. This allows them to adapt to varying environmental conditions.

2. **Identifying Organisms with Mixotrophic Nutrition**:
- Common examples of mixotrophic organisms include certain species of **Euglena**, which can photosynthesize in light and absorb nutrients in the dark.
- **Dinoflagellates** are another group that can exhibit mixotrophic behavior. Some species can photosynthesize, while others can ingest food particles.

3. **Classifying Organisms**:
- In the context of biological classification, mixotrophic organisms are often found in the **Protista** kingdom. This kingdom includes unicellular eukaryotic organisms, many of which can exhibit mixotrophic nutrition.

4. **Conclusion**:
- Therefore, the organisms that exhibit mixotrophic nutrition primarily belong to the **Protista** kingdom, with notable examples being **Euglena** and certain **Dinoflagellates**.

### Final Answer:
Mixotrophic nutrition is present in organisms such as **Euglena** and **Dinoflagellates**, which are classified under the kingdom **Protista**.

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