UPSC Prelims PYQ | Species Interactions
Q1. Which is not a parasite ? (a) Tick (b) Housefly (c) Bed bug (d) Louse (UPSC Prelims 1984) Answer: (b) Housefly Explanation: A parasite lives on or inside a host and derives nutrients at the host’s expense. Tick, bed bug, and louse are true parasites. The housefly, however, is a vector, not a parasite—it …