Biology: protists (Kingdom Protista) vs bacteria (Kingdom Monera)

The tutor makes some comparisons between protists and bacteria.

Members of Kingdom Protista are generally single-celled organisms that live in water. They form a significant part of ocean plankton. Bacteria are typically single-celled as well, and are found virtually everywhere that supports life.

Unlike a Moneran (bacterium), a protist has a nucleus and organelles each separated from the cytoplasm by its own membrane. This distinction means that Monerans are prokaryotes, while Protists are eukaryotes.

While Protists may have appeared around 1.5 billion years ago, Monerans are much older, having possibly emerged 3.5 billion years ago.

I’ll be talking more about Monerans and Protists in coming posts:)


Mader, Sylvia. Inquiry into Life, 9th ed. Toronto: McGraw-Hill, 2000.

Ritter, Bob et al. Biology, BC ed. Scarborough: Nelson, 1996.

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

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