animal diversity. what is an animal? animal characteristics –eukaryotic –multicellular...
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![Page 1: Animal Diversity. What is an Animal? Animal Characteristics –Eukaryotic –Multicellular –Heterotrophic –Lack cell walls Unique combination](https://reader033.vdocument.in/reader033/viewer/2022061511/56649d365503460f94a0d5f3/html5/thumbnails/1.jpg)
Animal Diversity
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What is an Animal?
• Animal Characteristics– Eukaryotic– Multicellular– Heterotrophic– Lack cell walls
• Unique combination
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Other Interesting Features
• Internal digestion (digestive tract)
• Life cycle– Diploid adults produce haploid gametes– Some develop directly to adult form– some go through a larval (immature) stage
• Metamorphosis = change in body from larva to adult
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Evolution of Animal Life
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Phylum Porifera
• Add sponge diagram & pics
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Radial Symmetry
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Phylum Cnidaria
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Cnidocytes
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Bilateral Symmetry
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Phylum Platyhelmenthes
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Body Cavities - Acoelomate
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Body Cavities - Pseudocoelomate
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Body Cavities - Coelomate
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Phylum Nematoda
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Phylum Moluska
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Mollusk Key Features
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Segmentation
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Phylum Annelida
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Phylum Arthropoda
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Arthropod Body Plan
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Phylum Echinodermata
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Phylum Chordata
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Vertebrates
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First VertebratesAgnathans (jawless fishes)
Lampreys & hagfish
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Evolution of Jaws
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Fish
• Most successful & diverse group of vertebrates– ~30,800 living species– Amphibians evolved from them
• Key characteristics– Gills– Vertebral column– Single loop circulatory system– Nutritional deficiencies
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Fish
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Evolution of Amphibians
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Amphibians
Anura Urodella
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Evolution of Amniotes
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Extant Reptiles
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Evolution of Birds from Reptiles
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Extant Birds
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Mammalia