Home Biology Organisms and Populations Statement Based Questions (I) The human liver fluke, a nematode parasi…
Biology Organisms and Populations Statement Based Questions Single Correct MCQ
Published on: August 14, 2026

(I) The human liver fluke, a nematode parasite, depends on two intermediate hosts (snail and fish) to complete its life cycle.

(II) The malaria parasite needs a vector (mosquito) to spread to other hosts.

(III) The female mosquito is not considered parasite, however it needs our blood for reproduction.

(IV) In case of brood parasitism, the eggs of parasitic birds (e.g. cuckoo) are not detected and ejected from the nest because of parasite’s eggs resemble the hosts eggs in morphology and colour.

(V) A population of frogs protected from all predators would increase indefinitely with unlimited food resources.

Which statements are correct?

A
(I) and (II)
B
(II) and (III)
C
(III), (IV) and (V)
D
(I), (II), (III) and (IV)

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Text Solution

Verified by Experts
The correct answer is:
D

(I) & (II): Both accurately describe the life cycles and host requirements of the liver fluke (an flatworm, though often grouped with parasites requiring two hosts) and the malaria parasite.

(III): Female mosquitoes are technically considered micro-predators or "fleeting" visitors rather than parasites because they don't live on/in the host; they only take blood to provide protein for their eggs.

(IV): This is the definition of brood parasitism, where the parasite's eggs evolve to mimic the host's eggs to avoid detection.

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