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Protoktisten (Protoctistae)
All the eukaryotic single-celled microrganisms previously labelled protista (protozoa and protophyta), but also certain multi-celled organisms, such as kelp, that don't belong to the plant, animal or fungi kingdoms. There are known to be thousands of species of these organisms, all of them aquatic: they include the amoebas, algae, seaweeds, slime molds, ciliates, diatoms, paramecia, forams and many others.
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