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Published byGeorge Stewart Modified over 9 years ago
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3,500,000,000 years ago Blue-green algae was the first life on earth 370,000,000 years ago Vertebrates appeared Amphibians and reptiles
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65,000,000 years ago Dinosaurs disappeared from fossil record
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70-40 million years ago Development of placental mammals Placental mammals Have a placenta through which the embryo and fetus are nourished through the uterus
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Pariah dogs Semi-feral dogs that live near towns and survive by scavenging on garbage Wolf pups Hunters tame young of their prey Companions or watchdogs Fossils date back 12000 years
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cats - 3500 years ago The ancient Egyptian legend has it that the dead spirits feared cats. Therefore, they were considered guardians of the after world. Many mummified cats have been found in tombs throughout Egypt. Also control of rodents
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Dogs 72 million dogs In 37.2 % of households Cats 81.7 million cats In 32.4 % of households ** Most cat owners have an average of 2 cats
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Pet food Veterinary Increased 38% for dogs since 2001 Supplies and over the counter medicines Live animal purchases Pet services (grooming, boarding)
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Hospitals Colleges and universities Diagnostic labs Pharmaceutical and biotechnology
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Pet care workers Zoo administrators Lab animal care workers Small animal breeders Animal trainers Animal groomers Veterinarians Veterinary technicians biologist
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Taxonomy the science of naming an classifying organisms 7 taxonomic divisions Kingdom Phylum Class Order Family Genus species
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Monera - bacteria Protista – single celled organisms Plantae – multicellular, photosynthesizing Fungi – mold, yeast Animalia –invertebrates and vertebrates
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Have an embryonic notochord A flexible cord of cells in the embryo stage of growth that eventually becomes the vertebra Dorsal tubular nerve Spinal chord Pharyngeal or throat area gills Throat, nose, mouth area A rear area tail
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Mammals Mammary glands Covered in hair Well developed brain Reptilia Cold blooded Lungs Bone skeleton Scales or plates Heart = 3 chambers
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Aves Warm blooded Two legs, wings, feathers Lay eggs Osteichthyses Bony fish Live in water Breath with gills scales
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Kingdom – Animalia Phylum – Chordata – animal with vertebrae Class – Mammalia – animals that suckle young Order – Carnivora – meat eaters Family – Canidae – dog family Genus – Canis - dogs Species – familiaria – domestic dog
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Genus Species Dog Canis familiaris
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