Question

Mammals have seven cervical vertebrate as a character of the clade Mammalia, regardless of their body size or neck length. Thus, mice have the same number as giraffes. Explain how all dinosaurs are placed in the same clade, despite the extreme variation in the number of cervical vertebrae for different dinosaur species

Answer 1

Clade includes a group of organisms believed to comprise all the evolutionary descendants of a common ancestor. All dinosaurs are placed in same clade , but the number of cervical vertebrae are different in different dinosaur species. Most dinosaurs possessed 9 to 10 cervicals, although higher numbers were achieved in some groups including sauropods.

So the number of cervical vertebrae of dinosaurs are different but they mostly have same anatomy , so the all dinosaurs belong to same clade