Platyhelminthes — NEET Biology Questions

Practice 30 questions on Platyhelminthes from Animal Kingdom (NCERT Class 11, Chapter 4). Free samples below — get all 30 in the app.

30 Questions Animal Kingdom Class 11

Sample Questions — Platyhelminthes

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MCQ
Which of the following statements are correct regarding platyhelminthes? I. They are acoelomate and bilaterally symmetrical. II. They show organ-system level of organisation. III. They possess both excretory and circulatory systems. IV. Some show high regeneration capacity.
  • A. I, II, III and IV
  • B. II and III
  • C. I and III
  • D. I, II, and IV
✅ Correct Answer: D
They lack circulatory system, but have organ-level systems, bilateral symmetry, and some regenerate (e.g., Planaria).
MCQ
An animal has dorsoventrally flattened body and hooks and suckers. Identify the correct phylum:
  • A. Annelida
  • B. Nematoda
  • C. Echinodermata
  • D. Platyhelminthes
✅ Correct Answer: D
The description corresponds to a tapeworm with attachment organs (hooks and suckers), a trait seen in parasitic flatworms.
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MCQ
Assertion (A): Platyhelminthes show bilateral symmetry and dorsoventral flattening. Reason (R): These features allow better tissue differentiation and cephalisation.
  • A. Both A and R are true, and R is the correct explanation of A
  • B. Both A and R are true, but R is not the correct explanation of A
  • C. A is true, R is false
  • D. A is false, R is true
✅ Correct Answer: A
Bilateral symmetry allows for distinct anterior-posterior axes and better movement, supporting cephalisation.
MCQ
Which of the following statements explains the evolutionary significance of bilateral symmetry in flatworms?
  • A. It helps in anchoring to host tissues
  • B. It allows sensory concentration at the anterior end
  • C. It reduces the need for germ layers
  • D. It supports free-floating life forms
✅ Correct Answer: B
Bilateral symmetry facilitates cephalisation—concentration of sense organs toward the front.
MCQ
Which of the following best explains why Platyhelminthes are considered acoelomates?
  • A. Their body cavity is filled with fluid
  • B. They lack a true body cavity between body wall and gut
  • C. Their coelom is partially lined with mesoderm
  • D. Their gut is coiled within a pseudocoel
✅ Correct Answer: B
Platyhelminthes do not possess a body cavity (coelom) at all, hence classified as acoelomates.

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