Basis of classification — NEET Biology Questions

Practice 32 questions on Basis of classification from Animal Kingdom (NCERT Class 11, Chapter 4). Free samples below — get all 32 in the app.

32 Questions Animal Kingdom Class 11

Sample Questions — Basis of classification

Try 5 questions below from Basis of classification. Get all 32 in the MedicNEET app.

MCQ
Why are pseudocoelomates considered evolutionarily intermediate?
  • A. They have fully lined body cavity
  • B. They show neither ectoderm nor endoderm
  • C. Their body cavity is partially lined by mesoderm
  • D. They lack any body cavity
✅ Correct Answer: C
In pseudocoelomates, mesoderm exists as scattered pouches.
MCQ
Which of the following animals has organ level of organisation?
  • A. Sponges
  • B. Coelenterates
  • C. Platyhelminthes
  • D. Ctenophora
✅ Correct Answer: C
Platyhelminthes show organ level where tissues form organs.
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MCQ
Which of the following does NOT show notochord formation during embryonic development?
  • A. Amphioxus
  • B. Echinoderm
  • C. Frog
  • D. Fish
✅ Correct Answer: B
Notochord is a defining feature of chordates only. Echinoderms are non-chordates.
MCQ
Eliminate the INCORRECT statement regarding coelomates:
  • A. Body cavity is present
  • B. Cavity is lined by mesoderm
  • C. Found in annelids and molluscs
  • D. Mesoderm is scattered in pouches
✅ Correct Answer: D
Scattered mesoderm occurs in pseudocoelomates like Aschelminthes, not coelomates.
MCQ
Animals having body cavity not lined by mesoderm are called:
  • A. Acoelomates
  • B. Coelomates
  • C. Triploblastic
  • D. Pseudocoelomates
✅ Correct Answer: D
In pseudocoelomates, mesoderm is scattered in pouches.

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