Which of the following is not a chordate?Sea squirtElephantSea starHuman
Question
Which of the following is not a chordate?Sea squirtElephantSea starHuman
Solution
The Sea star is not a chordate.
Here's why:
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Chordates are a broad group of animals that includes vertebrates (animals with backbones), as well as several closely related invertebrates.
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They are characterized by having at some point in their lives: a notochord, a dorsal hollow nerve cord, pharyngeal slits, an endostyle, and a post-anal tail.
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Sea squirts, elephants, and humans all belong to the phylum Chordata because they have these features at some stage of their life cycle.
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Sea stars, on the other hand, belong to the phylum Echinodermata. They do not have these features and are therefore not considered chordates.
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