All living things are classified into 3 large domains.

Domains Bacteria and Archaea are unicellular prokaryotes and possess no nucleus.

Each of these two domains may comprise several kingdoms.

Domain Eukarya is split into 4 kingdoms of organisms with a nucleus.

1. Protista contains both unicellular and multicellular organisms.

2. Plantae are multicellular, photosynthetic, terrestrial organisms.

3. Fungi are multicellular and digest food externally.

4. Animalia are multicellular and digest food internally.

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