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Grade: 12

                        

Which one of the following is a chordate but not a vertebrate? A Scoliodon B Salamender C Amphioxus D Snake

one month ago

Answers : (1)

Mayank Ranka
askIITians Faculty
214 Points
							

Amphioxus also known as lancelet is a fish-like marine chordate. Unlike vertebrates, the dorsal nerve cord is not protected by bone but by a simpler notochord made up of a cylinder of cells that are closely packed to form a toughened rod. The lancelet notochord, unlike the vertebrate spine, extends into the head and therefore they are placed in subphylum Cephalochordata. Hence, option C is correct.

one month ago
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