Civil Services UPSC Mock Test Series 2025 (Prelims + Mains) General Knowledge Ecology and Environment
Consider the following organisms:
1. Aphids
2. Ticks
3. Leeches
4. Fleas
5. Lice
How many of the above are ectoparasites (parasites that live on the outside of the host)?
1
Only two
2
Only three
3
Only four
4
All five