Question

Which one of the following is categorised as parasite in true sense ?

• A. Head louse living on the human scalp as well as laying eggs on human hair
• B. The cuckoo (koel) lays eggs in crow's nest
• C. The female Anopheles bites and sucks blood from humans
• D. Human foetus developing inside the uterus draws nourishment from the mother

Answer 1

The Correct Option is A

Parasitism is an association in which one organism (the parasite) lives on (eetoparasitism) or in (endoparasitism) the body of another (the host), from which it obtains its nutrients. They also produce vast numbers of eggs there e.g., head louse living on the human scalp.