Question:
Identify the incorrect pair regarding vertebrae:
A. Birds – Amphicoelous
B. Fishes – Procoelous
C. Urodela – Procoelous
D. Caecilians – Amphicoelous
Identify the incorrect pair regarding vertebrae:
A. Birds – Amphicoelous
B. Fishes – Procoelous
C. Urodela – Procoelous
D. Caecilians – Amphicoelous
A. Birds – Amphicoelous
B. Fishes – Procoelous
C. Urodela – Procoelous
D. Caecilians – Amphicoelous
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Birds → Heterocoelous; Urodela → Amphicoelous; Fishes → mostly Amphicoelous, some Procoelous.
Updated On: May 17, 2025
- A, C
- A, D
- B, D
- B, C
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The Correct Option is A
Solution and Explanation
- A. Birds – Amphicoelous: Incorrect. Birds have heterocoelous vertebrae in the neck region, not amphicoelous. Amphicoelous vertebrae (concave on both sides) are more typical of fish.
- B. Fishes – Procoelous: Correct for some advanced fishes, but not all.
- C. Urodela – Procoelous: Incorrect. Urodela (salamanders) generally have amphicoelous vertebrae.
- D. Caecilians – Amphicoelous: Correct. Caecilians do have amphicoelous vertebrae.
Hence, A and C are incorrect pairs.
- B. Fishes – Procoelous: Correct for some advanced fishes, but not all.
- C. Urodela – Procoelous: Incorrect. Urodela (salamanders) generally have amphicoelous vertebrae.
- D. Caecilians – Amphicoelous: Correct. Caecilians do have amphicoelous vertebrae.
Hence, A and C are incorrect pairs.
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