Protista includes

Options

A. Heterotrophs
B. autotrophs
C. saprotrophs
D. All the above.

Answer

### Step-by-Step Solution:

1. **Understanding Protista**: The kingdom Protista is a diverse group of organisms that are primarily unicellular and can exhibit characteristics similar to both plants and animals.

2. **Plant-like Features**: Some protists, such as diatoms and dinoflagellates, possess plant-like features. They have a cell wall and can perform photosynthesis, which means they can produce their own food using sunlight.

3. **Euglenoids**: Euglenoids, like Euglena, are also part of Protista. They are unique because they can perform both autotrophic (photosynthesis) and heterotrophic (consuming organic matter) nutrition. This mixotrophic mode allows them to adapt to varying environmental conditions.

4. **Slime Molds**: Slime molds are another group within Protista. They exhibit saprophytic nutrition, meaning they feed on dead and decaying organic matter. This is a form of heterotrophic nutrition.

5. **Protozoan Protists**: Protozoans are also included in the Protista kingdom. They are primarily heterotrophs, similar to animals, as they obtain their nutrition by consuming other organisms.

6. **Conclusion**: Given the diversity in nutritional modes among members of the Protista kingdom, including autotrophs (like diatoms and dinoflagellates), mixotrophs (like euglenoids), saprotrophs (like slime molds), and heterotrophs (like protozoans), the correct answer to the question "Protista includes" is "all of the above."

### Final Answer:
Protista includes diatoms, dinoflagellates, euglenoids, slime molds, and protozoans.

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