Protozoans lack which of these as locomotory organs?
Protozoans are single-celled primitive organisms. They possess greater adaptability for locomotion, i.e. via locomotory organs like Pseudopodia (also known as false feet), Flagella (thread-like projections) and Cilia (short hair-like projections). Parapodia are present in marine gastropods, and not in protozoans.
The correct answer is D.