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Entomology 101 The Living Realm Where Insects & Humans Fit David J. Shetlar, Ph.D. The “BugDoc” The Ohio State University, OARDC & OSU Extension Columbus, OH © Sept, 2009, D.J. Shetlar, all rights reserved
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Biological Classification Non-Cellular Life Virus, Viroids, & Prions Cellular Life (broken into domains) Bacteria (prokaryotes – no nuclei) Archaea (prokaryotes of extremes) Eukarya (eukaryotes – with nuclei)
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Virus Replication 1.Attaches to living cell 2.Penetrates cell or injects genome. 3.Replicates using cellular organelles. 4.Assembles new viral bodies. 5.Lysis – released from cell, thereby killing it!
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Prokaryote Cell
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Eukaryote Cells Plant CellAnimal Cell
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Biological Classification Eukarya Kingdoms Excavata – unicellular w/flagella Rhizaria – unicellular amoeboids Chromalveolata – algae & diatoms Plantae – true plants Amoebozoa – true amoeboids Fungi – molds and fungi Animalia – true animals
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Animal Phyla
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Diploblastic Animal
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Triploblastic Body Types
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Protostomes vs Deuterostomes
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Phylum Porifera – Sponges (5,000 species including fresh water)
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Phylum Cnidaria – Corals, Anemones, Jellyfish (9,000 species including fresh water)
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Phylum Platyhelmenthes – Flatworms, Flukes, & Tapeworms (10,000 species, mainly parasitic)
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Phylum Nematoda – Roundworms (>15,000 species, all trophic areas)
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Protostomes vs Deuterostomes
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Phylum Annelida – Segmented Worms (9,000 species, all trophic areas)
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Phylum Mollusca – Snails/Slugs, Clams, Cephalopods (50,000 species, aquatic and terrestrial)
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Phylum Arthropoda – Arachnids, Crustaceans, Myriapods Insects (950,000 species, aquatic and terrestrial)
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Phylum Echinodermata – Starfish, Sea Urchins, Sea Cucumbers (7,000 species, all marine)
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Phylum Chordata – Urocordata, Cephalocordata, Vertebrata (70,000 species)
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