Question : Which of the following is a roundworm?
Option 1: Planaria
Option 2: Ascaris
Option 3: Liver fluke
Option 4: Taenia
Correct Answer: Ascaris
Solution : The correct answer is Ascaris.
Ascaris is a roundworm. Ascaris lumbricoides, commonly known as the large intestinal roundworm, infects the human gastrointestinal tract. It is one of the most prevalent parasitic worms in humans, causing the medical condition ascariasis. Unlike flatworms such as Planaria, liver fluke, and Taenia, which belong to different phyla (Platyhelminthes), Ascaris falls under the phylum Nematoda, characterised by its cylindrical, elongated body and rounded cross-section.
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