Which is not a feature of non-chordates?

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AIIMS BSc NURSING 2023 Memory-Based Paper
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  1. Central nervous system is ventral 
  2. Gill slits are absent
  3. Heart is dorsal
  4. Central nervous system is dorsal

Answer (Detailed Solution Below)

Option 4 : Central nervous system is dorsal
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The correct answer is the Central nervous system is dorsal

Explanation:

The features of non-chordates among the given statements are:

  • The central nervous system is ventral.
  • Gill slits are absent.
  • Heart is dorsal

Comparison of Chordates and Non-chordates:- 

Chordates Non- chordates
Notochord is present Notochord absent
Central nervous system is dorsal,
hollow and single.
Central nervous system is ventral, solid
and double.
Pharynx perforated by gill slits. Gill slits are absent.
Heart is ventral. Heart is dorsal (if present).
A post-anal part (tail) is present. A post-anal part (tail) is absent
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