Carolus Linnaeus 1707-1778 is the father of binomial nomenclature Way of identifying organisms ...
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Carolus Linnaeus 1707-1778 is the father of binomial nomenclature
Way of identifying organisms K,P,C,O,F,G,S Now we have three domains1. Archae – methanogens, thermophiles,
halophiles2. Bacteria (Eubacteria) – all other
prokaryotes3. Eukarya – protists, fungi, plant animals
Classification of Organisms
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Protists - protozoans
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Amoeba
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Giardia – hiker’s diarrhea
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Trichonympha - termites
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Trypanosoma – African sleeping sickness
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Paramecium
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Diatom
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Red Algae
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Kelp Forest
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Volvox – Green Algae
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Slime Mold
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Fungi Fungi grow as filaments – hyphae Mycelium – mass of hyphae Most do not have complete cell walls –
septa divide walls Cell walls – contain chitin Haustoria – hyphae that penetrate their
host. Zygomycota – Bread mold Ascomycota – cup fungus Basidiomycota - mushrooms
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zygomycota
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Ascomycota
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Mushrooms - Basidiomycota
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Mosses, ferns, gymnosperms, angiosperms Green algae is the ancestor of plants
Plants
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No symmetry – sponges – Porifera Radial Symmetry – jellyfish – Cnidaria Acoelomates – flatworms – Platyhelminthes Pseudocoelomates – roundworms/rotifer –
Nematoda Coelomates – all others Protostome – Molluscs, Annelids, Arthropods Deuterostome – Chordates and Echinoderms
Animal Phylogeny
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Symmetry
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Body Cavity
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Sponges – Phylum Porifera
1. Sessile – does not move2. Mostly marine3. Multicellular – but has no tissues4. No body symmetry5. Gets nutrients through pores
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Sponges - Porifera
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Sponge Anatomy
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Phylum Cnidaria – stinging animals1. Soft bodies with tentacles and stinging
cells2. Radial symmetry3. One opening - both mouth and anus4. Nerve net5. Two cell layers – ectoderm and
mesoderm6. Polyp and medusa7. Hydra, jelly fish, sea anemone
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Cnidarians
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Cnidarian Anatomy
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Tentacles
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Phylum Platyhelminthes - Flatworms1. Flat bodies with bilateral symmetry2. Nerve ladder with brain3. 3 cell layers – ectoderm, mesoderm and
endoderm4. Mostly parasitic5. One opening 6. Planaria, flukes, tapeworms
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Tapeworm - Platyhelminthes
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Planarian – Free Living flatworm
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Phylum Nematoda - Roundworms1. Bilateral symmetry2. Tough outer covering - cuticle3. Digestive cavity4. Can be parasites5. First to have body cavity – pseudocoelom6. Ex. Roundworms, pinworms, heartworms
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Phylum Rotifera - pseudocoelomates Very small Pseudocoelom Crown of cilia for feeding
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Nematodes
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Phylum Annelida – Segmented Worms1. Ringlike segmented bodies2. Bilateral symmetry3. Tubelike digestive tract4. Organ systems5. Setae on segments6. Dorsal vein7. Ventral nervous system8. True Coelom9. Ex. Earthworms, leeches
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Annelids
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AnnelidaSegmented Worms
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Phylum Mollusca – Soft bodied invertebrates1. Soft bodies with shells2. Move with muscular foot3. Have a mantle that secretes the shell4. Bilateral symmetry5. True Coelom6. Ex. Clams, scallops, squid, octopus, snails,
slugs
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Mollusca
Class Bivalves
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Mollusca
Class Gastropoda
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Mollusca
Class Cephalopoda
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Phylum Arthropoda - Insects Segmented Jointed Appendages Exoskeleton made of Chitin Head, thorax, abdomen Crustaceans – crabs, lobster, shrimps Millipedes and Centipedes Insects
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Crustaceans
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Insects
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Protostome and deuterostome development
Protostomes – determinate cleavage where early cells have predetermined fate
Deuterostomes – indeterminate cleavage where early cells can be the whole organism
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Echinoderms Deuterostome development – blastopore
becomes the anus Star fish, brittle stars, sea urchin
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Sea Star
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Echinoderms
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Chordates
Lancelets
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Tunicate