ClassificationTake II

3 DomainsHighest level of organizationBacteria: prokaryotesArchaea: Live in extreme environmentsEukarya: Protists, fungi, animals & plants

Bacteria

Archaea

EukaryaPlantaeProtistaFungianimalia

CnidariansAnimals that use stinging cells to capture

food and defend themselvesSpongesAnemonesSea jellies

FlatwormsFlatworms: tapeworms & planarians; These

have a long, flat body

Roundworms: nematodes: These have a long, round body

Annelida: earthworm

Porifera• Sponges: invertebrates with no body

symmetry and no tissues and organs• Sponges

ArachnidsArthropods with 2 body sections, 4 pairs of

legs, and no antennaeExamples: spiders, mites, scorpions and ticks

CrustaceansAn arthropod with 2 or 3 body sections, 5

pairs on legs and 2 pairs of antennaeCrabs & lobsters are examples

MolluscsOrganisms with a soft body and a shell. Represented by snails and slugs

Bi-valvesMollusks with two shellsClams, oysters and mussels

InsectsArthropods with an external skeleton,

segmented body and jointed attachments called appendages

CicadaButterflygrasshopper

CephalopodsAn ocean dwelling mollusk that has adapted

to form tentacles around its mouth. Squid, octopus and nautilus

VertebratesAmphibians, fishes, birds, reptiles, marsupials, monotremes, and placental mammals

Amphibians• Animals that start their lives in water and then

move onto land. • Frogs, salamanders

Reptiles• Animals that are designed to conserve water from

their skin, kidneys and eggs. • Snakes• Turtles• Lizards• Alligators and crocodiles

Birds• An endothermic vertebrate that has feathers and a

4-chambered heart. This animal also lays eggs. • Eagle• Duck• Cardinal

MammalsThere are 3 classes:

Placental mammals: connect to their mothers via a placenta (humans, giraffes, bears)

Monotremes: mammals that lay eggs (Platypus and 2 spiny anteaters)

Marsupials: infant develops in a pouch (koala bear, kangaroos, opossums)

FishThese are animals that obtain oxygen through their gills and live in water.

Jawless fish have no jaws or scales: eels, lamprey, catfish

Cartilaginous fish have jaws, scales and a skeleton made of cartilage; sharks, skates & rays

Bony fish have jaws, scales a pocket on each side of the head (for holding the gills) and a skeleton of hard bones. This includes trout.

For the Re-take quiz Friday:You must know: What kind of animals are found in which

class & What are the characteristics of animals in each class

Hint: Look in your notes-you just wrote it down!