Which of the following statements is true?

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(A) The phylum $Chordata$ is characterized by the presence of a notochord, a dorsal hollow nerve cord, and paired pharyngeal gill slits.Vertebrates ar

Vedclass · Accepted Answer

All vertebrates are chordates.

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(A) The phylum $Chordata$ is characterized by the presence of a notochord, a dorsal hollow nerve cord, and paired pharyngeal gill slits.Vertebrates are a subphylum of $Chordata$ that possess a vertebral column.Since all vertebrates have a notochord during their embryonic development, they are classified as chordates.However, not all chordates are vertebrates (e.g., Urochordates and Cephalochordates do not have a vertebral column).Therefore, the statement "All vertebrates are chordates" is true, while the reverse is false.

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