* Protozoans are eukaryotic, not prokaryotic. This means they have a true nucleus and other membrane-bound organelles, unlike prokaryotes (like bacteria).

* Protozoans are not all autotrophic. While some protozoans are autotrophic (meaning they produce their own food through photosynthesis), many are heterotrophic. Heterotrophic protozoans obtain their food by consuming other organisms or organic matter.

Here's a breakdown:

* Prokaryotes: Single-celled organisms lacking a nucleus and other membrane-bound organelles (e.g., bacteria, archaea).

* Eukaryotes: Organisms with a nucleus and other membrane-bound organelles (e.g., plants, animals, fungi, protozoa).

* Autotrophs: Organisms that produce their own food through photosynthesis (e.g., plants, some algae, some protozoa).

* Heterotrophs: Organisms that obtain food by consuming other organisms or organic matter (e.g., animals, fungi, many protozoa).

Examples of Protozoans:

* Autotrophic: Euglena (uses photosynthesis)

* Heterotrophic: Amoeba (engulfs food), Paramecium (feeds on bacteria and other microorganisms)

Therefore, it's important to remember that protozoans are a diverse group with various feeding strategies and cellular structures.