2.  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

3. 65,000,000 years ago  Dinosaurs disappeared from fossil record

4.  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

5.  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

6.  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

7.  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

8.  Pet food  Veterinary  Increased 38% for dogs since 2001  Supplies and over the counter medicines  Live animal purchases  Pet services (grooming, boarding)

9.  Hospitals  Colleges and universities  Diagnostic labs  Pharmaceutical and biotechnology

10.  Pet care workers  Zoo administrators  Lab animal care workers  Small animal breeders  Animal trainers  Animal groomers  Veterinarians  Veterinary technicians  biologist

11.  Taxonomy  the science of naming an classifying organisms  7 taxonomic divisions  Kingdom  Phylum  Class  Order  Family  Genus  species

12.  Monera - bacteria  Protista – single celled organisms  Plantae – multicellular, photosynthesizing  Fungi – mold, yeast  Animalia –invertebrates and vertebrates

13.  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

14.  Mammals  Mammary glands  Covered in hair  Well developed brain  Reptilia  Cold blooded  Lungs  Bone skeleton  Scales or plates  Heart = 3 chambers

15.  Aves  Warm blooded  Two legs, wings, feathers  Lay eggs  Osteichthyses  Bony fish  Live in water  Breath with gills  scales

16.  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

17.  Genus  Species  Dog  Canis familiaris