3,500,000,000 years ago blue-green algae was the first life on earth 370,000,000 years ago ...

3,500,000,000 years agoBlue-green algae was the first life on earth

370,000,000 years agoVertebrates appearedAmphibians and reptiles

65,000,000 years ago Dinosaurs

disappeared from fossil record

70-40 million years agoDevelopment of placental mammals

Placental mammalsHave a placenta through which the embryo

and fetus are nourished through the uterus

Pariah dogsSemi-feral dogs that live near towns and

survive by scavenging on garbage

Wolf pupsHunters tame young of their preyCompanions or watchdogsFossils date back 12000 years

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

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

Pet food Veterinary

Increased 38% for dogs since 2001 Supplies and over the counter

medicines Live animal purchases Pet services (grooming, boarding)

Hospitals Colleges and universities Diagnostic labs Pharmaceutical and biotechnology

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

Taxonomy the science of naming an classifying

organisms 7 taxonomic divisions

Kingdom Phylum Class Order Family Genus species

Monera - bacteria

Protista – single celled organisms

Plantae – multicellular, photosynthesizing

Fungi – mold, yeast

Animalia –invertebrates and vertebrates

Have an embryonic notochordA flexible cord of cells in the embryo stage

of growth that eventually becomes the vertebra

Dorsal tubular nerveSpinal chord

Pharyngeal or throat area gillsThroat, nose, mouth area

A rear area tail

MammalsMammary glandsCovered in hairWell developed

brain

ReptiliaCold blooded LungsBone skeletonScales or platesHeart = 3

chambers

AvesWarm bloodedTwo legs, wings,

feathersLay eggs

OsteichthysesBony fishLive in waterBreath with gillsscales

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

Genus Species

DogCanis familiaris