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Q132 (IAS/2001) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Human health disease Answer Verified

Consider the following statements : I. Tapeworm is a hermaphrodite. II. Round-worm has separate sexes. III. Filaria is caused by a nematode. IV. Guinea-worm is an annelid. Which of these are correct ?

Result
Your answer: —  ·  Correct: B
Explanation

Statements I, II and III are correct while IV is false. Tapeworms (cestodes) are elongated, segmented flatworms and adult tapeworms are hermaphroditic, possessing both male and female reproductive organs [1]. Roundworms (nematodes) are generally dioecious with separate male and female individuals, so “round-worm has separate sexes” is true [1]. Filarial infections (e.g., Wuchereria, Brugia) are caused by parasitic nematodes, so statement III is correct [2]. Guinea-worm (Dracunculus medinensis) is likewise a parasitic nematode, not an annelid, so statement IV is incorrect [3]. Therefore the correct combination is I, II and III (option 2).

Sources

  1. [1] https://www.ncbi.nlm.nih.gov/books/NBK8282/
  2. [2] https://uou.ac.in/sites/default/files/slm/BSCZO-104.pdf
  3. [3] https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/dracunculus-medinensis
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