The Victoria SchoolSixth Grade

2012

The classification of organisms in an ordered system that indicates natural relationships.

Common Name: Domesticated Dog

Kingdom: Animalia *Class: Mammalia Order: Carnivora Family: Canidae Genus: Canis Species: C. familiaris

Common Name: Tiger Kingdom: Animalia *Class: Mammalia Order: Carnivora Family: Felidae Genus: Panthera Species: P. tigris

Living organism were classified into five kingdoms in the second half of the 20th century.

Prokaryotes were place in one kingdom and eukaryotes in four kingdoms.

When the DNA was compared, two very different groups of prokaryotes were identified, a higher grade of taxonomic group was needed to reflect this, now called a domain

Archaea Eubacteria EukaryotaEvolved from the earliest cells

The “modern” prokaryotes

Consists of all eukaryotes (cells with a nucleus

Inhabit only very extreme environments

Over 10,000 species

Consists of the 4 kingdoms:ProtistaFungiPlantaeAnimalia

Only a few hundred species exist

Differ structurally, biochemically, and physiologically from Archaea

live in harsh environments and may live in harsh environments and may represent the first cells to have evolved.represent the first cells to have evolved.

Sewage Sewage treatment treatment

plants, plants, thermal thermal

vents, etc.vents, etc.

ArchaeaArchaea

some of which cause human some of which cause human diseases, are present in almost all diseases, are present in almost all

habitats on earth.habitats on earth.

Many bacteria are important Many bacteria are important environmentally and environmentally and

commercially.commercially.

Live in Live in the the

intestineintestines of s of

animalsanimals

Eubacteria, Eubacteria,

Example: Streptococcus mutans forms biofilms on teeth, which cause dental decay.

•Protista (protozoans, algae…)

•Fungi (mushrooms, yeasts …)

•Plantae (multicellular plants)

•Animalia (multicellular animals)

They are microscopic, made up of 1 eukaryotic cell.

diatoms - a group of unicellular, eukaryotic

algae

Paramecium

Euglena gracilis