AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Leishmania has a whip-like structure (flagellum) at one end, so binary fission occurs in a definite orientation relative to it. Amoeba lacks such a fixed structure, so fission can occur in any plane.
The examiner expects you to link the presence of the flagellum in Leishmania to its fixed orientation of division. The key contrast is organised body structure (Leishmania) vs. no such structure (Amoeba). One crisp sentence covering both organisms earns full marks. Source: Chapter 7, Section 7.2.1.