Answer:
A protist- is any eukaryotic organism (that is, an organism whose cells contains a cell nucleus) that is not an animal, plant, or fungus.
Explanation:
The protist kingdom comprises unicellular eukaryotes.
All living organisms have been divided into two broad groups known as eukaryotes and prokaryotes. This classification is based on the complexity of their cell structures. The prokaryotes lack organelles and a true nucleus while these structures are present in the eukaryotic cell.
Based on this simple parameter, in the Five Kingdom system of classification, unicellular prokaryotes were known as Monera and unicellular eukaryotes were known as Protists.
Therefore, any single-celled organism with a true nucleus and membrane-bound organelles is a part of this kingdom of classification.
Fungi, Plantae and Animalia are other classified kingdoms. They are all multicellular with some exceptions. Fungi are saprophytic, plants are photosynthetic and animals are heterotrophic.
Some examples are amoeba and paramecium.
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