Protists are considered a polyphyletic group because they probably originated from
Correct answer: B. More than one moneran ancestor
- A. A common moneran ancestor
- B. More than one moneran ancestor
- C. The heritable genetic changes in viruses
- D. The organic substances of the environment
Explanation
Protists are polyphyletic because they arose from multiple independent evolutionary lines among the first eukaryotes, meaning they trace their ancestry back to more than one moneran (prokaryotic) line via various endosymbiotic events.The other options are wrong because: a single ancestor would be monophyletic; organic substances refer to the origin of life (abiogenesis); and viruses are not the ancestors, as endosymbiosis was the key event.
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About Kingdom Protista
Kingdom Protista contains mainly unicellular eukaryotes, although some forms are colonial or multicellular, with varied nutritional and reproductive methods. Questions examine protozoans, algae and examples such as Amoeba, Paramecium and Euglena, while distinguishing protists from prokaryotes, fungi and true plants.
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