1. Tardigrade
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  4. Persistent notochord is the feature of which among the following?

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Q. Persistent notochord is the feature of which among the following?

Bihar CECEBihar CECE 2015

Solution:

Notochord develops invariably from the dorsal wall of archenteron as a thickening or upfolding. Cyclostomata have a persistent notochord through out of life. Vertebral column is small imperfect neural archs over the notochord.