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Question

Which of the following statements is/are true?


  1. Invertebrates posses a dorsal nerve cord

  2. Non chordates have a vertebral column

  3. All chordates are vertebrates

  4. All vertebrates are chordate


Solution

The correct option is D

All vertebrates are chordate


Invertebrates or non-chordates do not possess a notochord. Their nerve cord too, is double ventral, and not dorsal hollow like that of the chordates. Vertebrata is a sub-phylum under Phylum Chordata in which, the embryoic notochord gets replaced by a bony or cartilaginous vertebral column in the adult. All vertebrates are thus, chordates, but all chordates are not vertebrates.

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