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In Whittaker's five-kingdom classification, where are blue-green algae placed?

Answer and explanation

Correct answer: Monera

Correct answer: A, Monera. The name “blue-green algae” is an older common name; these organisms are cyanobacteria. They are prokaryotic, so their cells do not contain a true membrane-bound nucleus or membrane-bound organelles. Whittaker's five-kingdom system placed prokaryotic organisms in Kingdom Monera, regardless of their ability to carry out photosynthesis. B is wrong because Protista mainly contains unicellular eukaryotic organisms. C is wrong because blue-green algae are not true plants in this classification; their prokaryotic organisation places them in Monera. D is wrong because fungi are eukaryotic heterotrophs with a different mode of nutrition. A common confusion is that their photosynthesis may make them seem plant-like, but cell organisation is the deciding feature here. Memory cue: cyanobacteria = prokaryotic = Monera.

Related tags

Five-Kingdom ClassificationMoneraCyanobacteriaBlue-Green AlgaeFive Kingdom ClassificationBiological ClassificationBiologyClass 11 Mcq

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