Home Biology Organisms and Populations Population Interactions Which one of the following is categorised as…
Biology Organisms and Populations Population Interactions Single Correct MCQ
Published on: August 13, 2026

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

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

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Verified by Experts
The correct answer is:
D

Head louse living on the human scalp as well as laying eggs on human hair: This is a "true parasite" (specifically an ectoparasite) because the louse spends its entire life cycle on the host, deriving all its nourishment from the host's blood and using the host's body as its habitat for reproduction.

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