Question

All Vertibrets are Chordets, but why all Chordets are not Vertibrets ? ​

Answer 1

Answer:

The members of sub-phylum - Vertebrata possess notochord during the embryonic stage. But in adults the notochord is replaced by a cartilaginous or bony vertebral column. ... Thus, the absence of notochord in adult vertebrates suggest that all vertebrates are chordates but all chordates are not vertebrates

Explanation:

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Answer 2

1) All chordates posses notochord in

some period of their development .

2) All vertebrates also have notochord during

embryonic, which is later replaced by veritabral

column.

3) Therefore all vertabrates are chordates.

4) but some chordates like urochordata and

cephalochordata do not posses vertebral

column and hence they are not vertabrates.

I hope understand you...

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