Prokaryote kingdom and Protoctist kingdom
Prokaryote Kingdom
Includes bacteria and blue-green algae.
They are unicellular (single-celled) organisms.
No true nucleus — their DNA is not inside a nuclear membrane.
Cells are simple in structure compared to other organisms.
Some are useful (e.g. in food production), while others can cause diseases.
Protoctist Kingdom
Made of mostly unicellular organisms, but more complex than prokaryotes.
They have a true nucleus — their DNA is inside a nuclear membrane.
Some, like Euglena, have chloroplasts and make food by photosynthesis.
Others, like Amoeba and Paramecium, take in food and act animal-like.
Protoctists are often found in water or damp places.
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