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. But in cephelochordates, notochord persists throughout life as such and in urochordates, notochord is present only in larval stages and absent in adults. Thus, it can be said that all vertebrates are chordates but all chordates are not vertebrates.
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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...
Step-by-step 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
• But in cephelochordates, notochord persists throughout life as such and in urochordates, notochord is present only in larval stages and absent in adults
• Thus, it can be said that all vertebrates are chordates but all chordates are not vertebrates
•
This question is important because it tests key concepts from the NCERT syllabus and is frequently asked in CBSE exams.
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