Diversity of Life - Animals

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1 Diversity of Life - Animals Protista Plantae Fungi Animalia Animals Eukarya eukaryotes multicellular heterotrophs - acquire nutrients by ingestion (internal digestion) tissues (nervous tissue and muscle tissue)

2 Diversity of Life - Animals Animal Evolution Protista Plantae Fungi Animalia Eukarya inward folding / specialization of cells --> digestive cavity

3 Diversity of Life - Animals Animal Body-Plan Evolution Radial-bilateral distinction Protista Plantae Fungi Animalia Eukarya Radial symmetry Bilateral symmetry

4 Diversity of Life - Animals Animal Body-Plan Evolution Body Cavity Protista Plantae Fungi Animalia Eukarya No body cavity True body cavity (coelom)

5 Diversity of Life - Animals Sponges Flatworms Mollusks Arthropods Chordates Cnidarians Roundworms Annelids Echinoderms Protista Plantae Fungi Animalia Eukarya 95% of all animals are invertebrates no backbone

6 Diversity of Life - Invertebrates Phylum: Porifera sponges simplest animals no nerves or muscles 9000 species (most marine) Filter feeders Sponges Flatworms Mollusks Arthropods Cnidarians Roundworms Annelids Echinoderms

7 Diversity of Life - Invertebrates Phylum: Cnidarians Jellyfish, Sea Anemones show radial symmetry body has a single cavity stinging tentacles 10,000 species (most marine) carnivores Sponges Flatworms Mollusks Arthropods Cnidarians Roundworms Annelids Echinoderms

8 Diversity of Life - Invertebrates Phylum: Platyhelminthes Flatworms bilateral symmetry 20,000 species some are parasitic (blood flukes, tape worms) Sponges Flatworms Mollusks Arthropods Cnidarians Roundworms Annelids Echinoderms

9 Diversity of Life - Invertebrates Phylum: Nematoda Roundworms cylindrical bodies 90,000 species some are parasitic (pinworms, hookworms) Sponges Flatworms Mollusks Arthropods Cnidarians Roundworms Annelids Echinoderms

10 Diversity of Life - Invertebrates Phylum: Mollusca Snails, Clams, Octopuses soft-bodied animals some protected by a hard shell 150,000 species (mostly marine) feed by scraping up food Sponges Flatworms Mollusks Arthropods Cnidarians Roundworms Annelids Echinoderms

11 Diversity of Life - Invertebrates Phylum: Annelids Earthworms, Leeches segmented bodies 15,000 species Sponges Flatworms Mollusks Arthropods Cnidarians Roundworms Annelids Echinoderms

12 Diversity of Life - Invertebrates Phylum: Arthropods Crustaceans, Insects, Spiders jointed appendages hard exoskeleton (exterior) 1 million species Sponges Flatworms Mollusks Arthropods Cnidarians Roundworms Annelids Echinoderms

13 Diversity of Life - Invertebrates Phylum: Echinoderms Sea Stars, spiny surfaces all marine endoskeleton (interior) most closely related to chordates (vertebrates) Sea Urchins Sponges Flatworms Mollusks Arthropods Cnidarians Roundworms Annelids Echinoderms

14 Diversity of Life - Vertebrates Fishes Amphibians Reptiles Birds Mammals Sponges Flatworms Mollusks Arthropods Cnidarians Roundworms Annelids Echinoderms Chordates Protista Plantae Fungi Animalia Eukarya

15 Diversity of Life - Vertebrates Fishes Amphibians Reptiles Birds Mammals Features unique to vertebrates: cranium backbone

16 Diversity of Life - Vertebrates Fishes Amphibians Reptiles Birds Mammals Fish ecto-therms egg layers respire by passing water over their gills Bony fish (Bass) stiff, bone skeleton marine / freshwater species swim bladder (buoyancy) Cartilaginous fish (Sharks) flexible, cartilage skeleton

17 Diversity of Life - Vertebrates Fishes Amphibians Reptiles Birds Mammals Amphibians (Frogs, Salamanders) two-lives tadpole (aquatic with gills) adult (terrestrial with lungs) egg layers (eggs lack shells) Omnivores Tetrapods (four legs)

18 Diversity of Life - Vertebrates Fishes Amphibians Reptiles Birds Mammals Reptiles (Turtles, Lizards, Snakes, Alligators) egg layers (terrestrial, amniotic eggs) ectotherms scales lungs

19 Diversity of Life - Vertebrates Fishes Amphibians Reptiles Birds Mammals reptilian traits Birds terrestrial, amniotic eggs scales on legs feathers body modified for flight endotherms

20 Diversity of Life - Vertebrates Fishes Amphibians Reptiles Birds Mammals Mammals posses hair mammary glands diaphragm endotherms Monotremes (egg layers) Marsupials (pouched) Eutherians (placental)

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