Question : All vertebrates are chordates but all chordates are notvertebrates'. Justify the statement.

Question : All vertebrates are chordates but all chordates are notvert

1.	Question : All vertebrates are chordates but all chordates are notvertebrates'. Justify the statement.
Answer» Solution :Animals belonging to phylum Chordata are fundamentally CHARACTERISED by the presence of a notochord, a dorsal, hollow nerve cord and paired pharyngeal gill slits. The MEMBERS 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 vertebratesare CHORDATES but all chordates are not vertebrates.