Which one among the following is a free living animal ?

[amp_mcq option1=”Liver fluke” option2=”Wuchereria” option3=”Plasmodium” option4=”Planaria” correct=”option4″]

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UPSC CDS-1 – 2021

A free-living animal is an organism that is not parasitic or sessile (attached to a substrate), but lives independently. Liver fluke (Fasciola hepatica), Wuchereria (Wuchereria bancrofti), and Plasmodium are all internal parasites that require a host organism to survive and reproduce. Planaria, a type of flatworm (Platyhelminthes), is commonly found in freshwater environments and is a free-living predator/scavenger.

Free-living organisms are independent and not parasitic or sessile. Planaria is a well-known example of a free-living flatworm.

Parasites live on or inside a host organism and benefit at the host’s expense. Sessile organisms are fixed in one place.

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