NEET 2025 · BiologyFish classesPrevious Year Question
All living members of the class Cyclostomata are:
Answer: (B) Ectoparasite. All living members of the class Cyclostomata are ectoparasites on some fishes.
- A.Symbiotic
- B.Ectoparasite✓
- C.Free living
- D.Endoparasite
Correct Answer
(B) Ectoparasite
Solution & Explanation
All living members of the class Cyclostomata are ectoparasites on some fishes. They have a jawless, sucking circular mouth, an elongated body with 6-15 pairs of gill slits, and a cartilaginous cranium and vertebral column. Examples are Petromyzon (Lamprey) and Myxine (Hagfish). NCERT Reference: Page 47, line 14
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