BIOL211#12and#13 - Chapter 34 Early in the Cambrian period...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Chapter 34 The Vertebrates Early in the Cambrian period, some 530 million years ago, an immense variety of animals inhabited the oceans One of these types of animals gave rise to the vertebrates Vertebrates derive their name from vertebrae, the series of bones that make up the backbone There are approximately 53,000 species of vertebrates Include the heaviest and largest animals ever to exist on Earth Dinosaurs: 40,000 kg Blue whales: 100,000 kg Vertebrates are members of the Phylum Chordata (chordates) Chordates are bilaterian and belong to the clade Deuterostomia Figure 34.1
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon