NEET 2023 Phase 1 · BiologyChordate featuresPrevious Year Question
Select the correct statements with reference to chordates. A. Presence of a mid-dorsal, solid and double nerve cord. B. Presence of closed circulatory system. C. Presence of paired pharyngeal gill slits. D. Presence of dorsal heart. E. Triploblastic pseudocoelomate animals. Choose the correct answer from the options given below:
Answer: (B) B and C only. Chordates have a dorsal, hollow and single nerve cord (so A is wrong), a ventral heart (so D is wrong), and are triploblastic coelomates, not pseudocoelomates (so E is wrong).
- A.A, C and D only
- B.B and C only✓
- C.B, D and E only
- D.C, D and E only
Correct Answer
(B) B and C only
Solution & Explanation
Chordates have a dorsal, hollow and single nerve cord (so A is wrong), a ventral heart (so D is wrong), and are triploblastic coelomates, not pseudocoelomates (so E is wrong). They do possess a closed circulatory system and paired pharyngeal gill slits, making B and C the only correct statements. NCERT Reference: Page 46, line 3
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