Question

“All vertebrates are chordates but all chordates are not vertebrates” justify the statement.​

Answer 1

Hola

All chordates have a notochord. ... 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.

Answer 2

Answer:

phylum chordata includes 3 sub- phyla :

1. Urochordata

2.Cephalochordata

3. Vertebrata

All vertebrates are included in phylum chordata. But phylum chordata not only include vertebrates but also urochordates and cephalochordates

Explanation:

Therefore all vertebrates are chordates but not all chordates are vertebrates !