Summary — Six Kingdoms of Classification
Living organisms are grouped into six kingdoms: animals, plants, fungi, protists, bacteria, and archaea.
Animals are multicellular eukaryotes that are heterotrophs, meaning they must eat other organisms for food.
Plants are multicellular autotrophs that make their own food through photosynthesis and have cell walls.
Fungi can be unicellular or multicellular eukaryotes with cell walls and are heterotrophs, often acting as decomposers or parasites.
Protists are very diverse eukaryotic organisms, mostly found in moist environments; some make their own food while others consume organisms.
Bacteria are single-celled prokaryotes that lack a nucleus. They are found almost everywhere and can be helpful or harmful.
Archaea are also prokaryotes, but they differ from bacteria in their cell chemistry and genetics, and many live in extreme environments.
These six kingdoms help scientists classify and understand the diversity of life on Earth.
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