Question

In which of the following notochord is present in embryonic stages?

• A. All chordates
• B. Few chordates
• C. Only vertebrates
• D. Non-chordates

Answer 1

Answer: (A)

The notochord is the primary axial supportive structure present in all chordate embryos as well as in many adults. In most of the higher chordates, the notochord is replaced by a vertebral column in adults.

Vertebrates come under the category of chordates.

Non-chordates do not have a notochord.

So, the correct answer is option A.