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ZoologyNEET 2024Basis of classification

Animal Kingdom

The following are statements about non-chordates:

A. The pharynx is perforated by gill slits.

B. The notochord is absent.

C. The central nervous system is dorsal.

D. The heart is dorsal, if present.

E. A post-anal tail is absent.

Choose the most appropriate answer from the options given below:

  1. A.A, B & D only
  2. B.B, D & E only✓
  3. C.B, C & D only
  4. D.A & C only

Solution

Non-chordates lack a notochord (B), have a dorsal heart if any (D) and no post-anal tail (E). Their central nervous system is ventral, and the pharynx is not perforated by gill slits — A and C are chordate features.

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