Question

"All vertebrates are chordates but all chordates are not vertebrates". Justify the
statement.​

Answer 1

Answer:

In vertebrates notochord is replaced by vertebral column (backbone), however vertebral column is not present in protochordates

Explanation:

All chordates have a notochord. .

herefore, all vertebrates are chordates but all chordates are not vertebrates.

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Answer 2

Answer:

Chordates include Urochordates, Cephalochordates (both are called protochordates) and vertebrates. In vertebrates notochord is replaced by vertebral column (backbone), however vertebral column is not present in protochordates. Therefore, all vertebrates are chordates but all chordates are not vertebrates.

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