Classification of Living Things. Tools Used to Classify Organisms 1. Comparative Morphology Compares Physical Structures, Traits 2. Evolutionary Relationships.
Cnidarians
Colorectal polyp
Development 3 phyla
Polyp
Chapter 17 The Evolution of Animals. What Is an Animal? – Animals are: Eukaryotic Multicellular Heterotrophic organisms that obtain nutrients by ingestion.
GI Grand Rounds October 1, 2004 Yoshi Makino, M.D. USC Department of Internal Medicine.
Colon Cancer. Epidemiology 3 rd most common cancer in males and females. Accounts for 11% of cancer deaths. In 2000, 130,200 cases (colon and rectum).
What are they? Invertebrate Animals. Invertebrates Animals that do not have a backbone or any bone tissue. Most are limited in size because of support.
Chapter 33
Molecular Evolution and Phylogeny
Phyla of invertebrates include 1.Porifera 2.Cnidarian 3.Flatworms 4.Roundworms 5.Segmented worms 6.Mollusks 7.Arthropods 8.Echinoderms i n o r d e r o.
