Answer: Mode of locomotion, pseudopodia versus flagella.
- A Mode of locomotion, pseudopodia versus flagella
- B Cell wall composition, cellulose versus chitin
- C Mode of nutrition, autotrophic versus chemosynthetic
- D Habitat, exclusively marine versus exclusively terrestrial
Correct answer: A. Mode of locomotion, pseudopodia versus flagella
Explanation: Entamoeba is an amoeboid protozoan that moves using pseudopodia, while Trypanosoma is a flagellated protozoan that moves using flagella. Both are heterotrophic, parasitic protists causing disease in humans.
Whittaker's five-kingdom system (1969) groups all cellular life by cell structure and nutrition; viruses, viroids, and lichens fall outside this system entirely since they aren't independently classifiable as one of the five.
Concept context
Whittaker's five kingdom system covering Monera, Protista, Fungi, plus viruses, viroids, and lichens. A foundational NEET chapter on how living organisms are grouped.