NEET 2024 · BiologyChordate featuresPrevious Year Question
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:
Answer: (B) B, D & E only. In non-chordates (Table 4.1): notochord is absent (B correct), gill slits are absent so A is wrong, the central nervous system is ventral and not dorsal so C is wrong, the heart is dorsal if present (D correct), and the post-anal tail is absent (E correct).
- A.A, B & D only
- B.B, D & E only✓
- C.B, C & D only
- D.A & C only
Correct Answer
(B) B, D & E only
Solution & Explanation
In non-chordates (Table 4.1): notochord is absent (B correct), gill slits are absent so A is wrong, the central nervous system is ventral and not dorsal so C is wrong, the heart is dorsal if present (D correct), and the post-anal tail is absent (E correct). Hence the correct statements are B, D and E, which is option (b). NCERT Reference: Page 46, line 48
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