Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 35 - Deuterostomes - Review Questions - Synthesize: 2

Answer

Various lines of evidence (genetics, morphology, etc.) point to the birds as the last living dinosaurs. However, they come from one major group of dinosaurs, not both, so one group of dinosaurs is, indeed, gone.

Work Step by Step

See the book where it moves from reptiles to birds and the evidence there about birds being descended from dinosaurs. In a monophyletic analysis, they would fit within the dinosaurs, and those together within the reptiles.
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