Topic: Basis of animal classification· Diversity in Living World

The following are the statements about non-chordates :A. Pharynx is perforated by gill slits.B. Notochord is absent.C. Central nervous system is dorsal.D. Heart is dorsal if present.E. Post anal tail is absent.Choose the most appropriate answer from…

The following are the statements about non-chordates :

A. Pharynx is perforated by gill slits.

B. Notochord is absent.

C. Central nervous system is dorsal.

D. Heart is dorsal if present.

E. Post anal tail is absent.

Choose the most appropriate answer from the options given below :

1. B, C & D only

2. A & C only

3. A, B & D only

4. B, D & E only

Doubtly Asked 30 Oct 2026 NEET UG 2024 Practice test neet Save WhatsApp Report

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Answer: 4. B, D & E only

Key idea: compare chordate and non-chordate features.

Non-chordates have no notochord (B), the heart, if present, is dorsal (D), and they lack a post-anal tail (E). Gill slits in the pharynx (A) and a dorsal nerve cord (C) are chordate features; non-chordates have a ventral solid nerve cord.

So B, D and E: option 4.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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The following are the statements about non-chordates :A. Pharynx is perforated by gill slits.B. Notochord is absent.C. Central nervous system is dorsal.D. Heart is dorsal if present.E. Post anal tail is absent.Choose the most appropriate answer from…

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