Question

""all vertebrates are chordates but all chordates are not vertebrates"" justify the statement

more than 300 words

Answer 1

all vertebrates are chordates because their processes three basic chordate features as:
1)all chordates processes are notochord
2) all chordates have a dorsal hollow nerve cord
3) notochord have pharyngeal Gill effects in some stage of their life cycle

all chordates are not vertibrates : vertebrate have vertebral column but protochordyes and agnetha have notochord that is not replaced by vertebral column
note : notochord it is stiff but flexible rod of vacuolated cells that lies ventral to nerve cord but dorsal cord to alimentary canal .it extend all along the mid Dorsal line of body


hope it may help u

# be brainly

Answer 2

Explanation:

The characteristic features of the phylum, Chordata, include the presence of a notochord and paired pharyngeal gill

slits. In sub-phylum Vertebrata, the notochord present in embryos gets replaced by a cartilaginous or bony vertebral

column in adults. Thus, it can be said that all vertebrates are chordates but all chordates are not vertebrates.