Question

What is the fate of notochord in higher chordates?

• A. The notochord is replaced by the vertebral column.
• B. The notochord is replaced by a nerve cord.
• C. The notochord is present throughout the life of higher chordates.
• D. The notochord is not present in chordates.

Answer 1

The correct option is A The notochord is replaced by the vertebral column.

• Chordates are characterized by the presence of a notochord.
• However, the notochord is replaced by a vertebral column, in some higher chordates like birds, mammals, etc.
• The vertebral column encloses the spinal cord and protects it.

Therefore, the correct answer is option A.