The notochord is a flexible, rod-shaped body found in embryo of all chordates. It is composed of cells derived from the mesoderm. It represents the primitive axis of embryo. In some chordates, it persists throughout life as the main axial support of the body (e.g., Amphibians), while in most vertebrates including humans it becomes the vertebral body of the vertebral column.
Which one of the following statements is totally wrong about the occurrence of notochord, while the other three are correct?
NEET UG 2011 — Botany Animal Kingdom
2011mcqhard
Which one of the following statements is totally wrong about the occurrence of notochord, while the other three are correct?
Official previous-year question
Held on 30 Apr 2011 · Verified 9 Jul 2026.
Options
- A
It is present only in larval tail in Ascidians
- B
It is replaced by a vertebral column in adult frog
- C
It is absent throughout life in humans from the very beginning
- D
It is present throughout life in Amphioxus
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