Animalia-Origin of the vertebrates

Animalia-Origin of the vertebrates - VERTEBRATE ORIGINS...

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Unformatted text preview: VERTEBRATE ORIGINS Outline of class Who are the vertebrates & where did they come from? What are the characteristics of the group? Evolutionary sequence of vertebrates. Evolutionary trends among the vertebrates Which of the following is most closely related to the chordates? 1 2 3 4 5 6 0% 0% 0% 0% 0% 0% 1. Squid 2. Sea cucumber 3. Crayfish 4. Anomalocaris 5. Trilobite 6. Earthworm 45 45 Deuterostome Phylogeny Echinoderms Hemichordates Tunicates Cephalochordates Vertebrates P h y l u m C h o r d a t a Subphylum: Urochordata Subphylum: Cephalochordata Subphylum: Vertebrata Phylum Chordata Which characteristic would be absent in the chordates? 1) Triploblastic 2) Segmentation 3) Enterocoelomic 4) Blastopore becomes anus 5) Spiral Cleavage 0% 0% 0% 0% 0% 45 45 Phylum Chordata General Characteristics 1) Bilateral Symmetry 2) Triploblastic 3) Segmented (Vertebrates) 4) Complete digestive tract 5) Enterocoelomic 6) Deuterostomate 7) Radial Cleavage What are the specific...
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Animalia-Origin of the vertebrates - VERTEBRATE ORIGINS...

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