The protists amoebae and paramecium are both eukaryote microorganisms. Especially in the sense that you need a light microscope to see them.
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A unicellular microorganism that lacks a nucleus is a prokaryote. Examples include bacteria and archaea.
Each cell of Penicillium chrysogenum has a single nucleus. However, when a plus strain and a minus strain fuse hypha, there will be two nuclei in each cell, until the nuclei fuse, forming sexual spores.
eukaryote, an example of prokaryote cell is bacteria
Microorganisms help break down or digest the food we eat into nutrients.
Protists are single-celled eukaryotic organisms with complex cellular structures, while viruses are non-living entities composed of genetic material wrapped in a protein coat. Protists are capable of independent life and reproduction, while viruses require a host cell to replicate. Additionally, protists exhibit a wide range of metabolic activities, while viruses are inert outside of a host cell.