In which kingdom is Euglena placed in Whittaker’s classification?

Correct answer: Protista

The correct answer is B, Protista. Euglena is a unicellular eukaryote, so it cannot be placed in Monera, whose members are prokaryotic. Euglena has chloroplasts and can photosynthesise in light, but it also shows animal-like features such as active movement with a flagellum and heterotrophic nutrition when light is unavailable. Because it combines plant-like and animal-like characteristics, Whittaker placed it in the diverse kingdom Protista. Option A is wrong because Monera contains prokaryotes. Option C is not chosen because Euglena is unicellular and has additional non-plant characteristics. Option D is wrong because it does not have the typical fungal mode of nutrition and body organisation. Memory cue: Euglena’s mixed features point to Protista.