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

Question

Which one of the following is categorised as a parasite in true sense? (A) The female Anopheles bites and sucks blood from humans. (B) Human foetus developing inside the uterus draws nourishment from the mother. (C) Head louse living on the human scalp as well as laying eggs on human hair (D) The cuckoo (koel) lays its eggs in crow's nest .

Tardigrade Admin · Accepted Answer

Parasites that feed on the external surface of the host organism are called ectoparasites. The most familiar examples of this group are the lice on humans and ticks on dogs. Head louse is an obligate ectoparasite that live on the scalp and needs human blood to survive.

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

The female Anopheles bites and sucks blood from humans.

Human foetus developing inside the uterus draws nourishment from the mother.

Head louse living on the human scalp as well as laying eggs on human hair

The cuckoo (koel) lays its eggs in crow's nest .

Parasites that feed on the external surface of the host organism are called ectoparasites. The most familiar examples of this group are the lice on humans and ticks on dogs. Head louse is an obligate ectoparasite that live on the scalp and needs human blood to survive.