Class – Cyclostomata — NEET Biology Questions

Practice 10 questions on Class – Cyclostomata from Animal Kingdom (NCERT Class 11, Chapter 4). Free samples below — get all 10 in the app.

10 Questions Animal Kingdom Class 11

Sample Questions — Class – Cyclostomata

Try 5 questions below from Class – Cyclostomata. Get all 10 in the MedicNEET app.

MCQ
Why are Cyclostomes considered primitive vertebrates?
  • A. Because they retain basic chordate characters without jaw evolution
  • B. Because they resemble echinoderms
  • C.Because they have lungs.
  • D. Because they are bony fishes
✅ Correct Answer: A
Their structural simplicity, including absence of jaws, makes them primitive vertebrates.
MCQ
Why are Cyclostomes considered jawless vertebrates despite having a vertebral column?
  • A. They lack paired fins which jawed fish have
  • B. They do not have vertebrae
  • C. They possess a sucking and circular mouth without jaws
  • D. Their skeleton is made of cartilage
✅ Correct Answer: C
Cyclostomes have a circular, jawless mouth adapted for sucking. Their jawless nature is the defining characteristic that places them in Agnatha.
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MCQ
How does absence of paired fins affect the locomotion of Cyclostomes?
  • A. It makes them faster swimmers
  • B. Reduces stability and maneuverability
  • C. Enables better jumping
  • D. Helps them live on land
✅ Correct Answer: B
Paired fins provide balance and direction in fishes; their absence makes cyclostome movement less controlled.
MCQ
What justifies classifying Lampreys and Hagfishes under Cyclostomata?
  • A. Presence of cartilage skeleton
  • B. Common larval forms
  • C. Ability to migrate to land.
  • D. Absence of jaws and presence of circular mouth
✅ Correct Answer: D
Both groups share a circular jawless mouth, the defining feature of Cyclostomata.
MCQ
Why are Cyclostomes not considered true fishes despite living in aquatic habitats?
  • A. Lack of scales and jaws
  • B. They are endothermic
  • C. They breathe using lungs
  • D. They have bony skeleton
✅ Correct Answer: A
True fishes possess jaws and scales, which are absent in Cyclostomes.

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