Question

........... is a long rod-like structure that runs along the back of animals.

• A. Protochord
• B. Notochord
• C. Monochord
• D. None of the above

Answer 1

The correct option is B Notochord

The notochord is a flexible rod-shaped body found in embryos of all chordates. It is composed of cells derived from the mesoderm and defines the primitive axis of the embryo. It runs along the back of animals. It is mainly present in the chordates.

So, the correct answer is option B.