Lancelets - PowerPoint PPT Presentation

Chapter 25 Animal Evolution – The Chordates Sections 1-5

Chapter 25 Animal Evolution – The Chordates Sections 1-5. 25.1 Transitions Written in Stone. Transitional fossils provide evidence of the evolution of birds from dinosaur ancestors Archaeopteryx , an ancient winged dinosaur with feathers Confuciusornis , a bird with claws on its wings

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Lecture 6 ANIMAL EVOLUTION: THE VERTEBRATES

Lecture 6 ANIMAL EVOLUTION: THE VERTEBRATES. Lancelets. Live in near-shore marine sediments Three to 7 cm long Have all the characteristics of chordates Use notochord and muscles for swimming motions just like tunicates. Have simple brain and head.

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