Home Biology Animal Kingdom Skill Builder In some chordates, the notochord is modified…
Biology Animal Kingdom Skill Builder Single Correct MCQ
Published on: August 14, 2026

In some chordates, the notochord is modified as the vertebral column. Such animals are called vertebrates. Which one of these statements makes sense?

A
All chordates are vertebrates, but all vertebrates are not chordates.
B
All vertebrates are chordates, and all chordates are vertebrates.
C
All vertebrates are chordates, but all chordates are not vertebrates.
D
Chordates are not vertebrates and vertebrates are not chordates.

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The correct answer is:
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The member of subphylum vertebrata possess notochord during the embryonic period. The notochord is replaced by a cartilaginous or bony vertebral column in the adult. Thus all vertebrates are chordates but all chordates are not vertebrates.

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