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Protoctista
(redirected from protoctists)

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Pro·toc·tis·ta (prtk-tst)
n.
A taxonomic kingdom consisting of unicellular protists and their descendant multicellular organisms, considered as a separate taxonomic kingdom in most modern classification systems.
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Anthropogenic Natural Unintentional Gas-to-particle conversions Internal combustion engines Forest fires Power plants Volcanoes (hot lava) Incinerators Viruses Jet engines Biogenic magnetite: magnetotactic Metal fumes (smelting, bacteria protoctists, mollusks, welding, etc.
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