Presentation on theme: "The Victoria School Sixth Grade 2012. The classification of organisms in an ordered system that indicates natural relationships."— Presentation transcript:
The Victoria School Sixth 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 20 th 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
ArchaeaEubacteriaEukaryota Evolved 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: Protista Fungi Plantae Animalia Only a few hundred species exist Differ structurally, biochemically, and physiologically from Archaea
live in harsh environments and may represent the first cells to have evolved. Sewage treatment plants, thermal vents, etc. Archaea
some of which cause human diseases, are present in almost all habitats on earth. Many bacteria are important environmentally and commercially. Live in the intestines of animals Eubacteria,
Example: Streptococcus mutans forms biofilms on teeth, which cause dental decay.