The 5 kingdoms
Eubacteria and Archea
Why we need a classification system
If a new animal is discovered with a beak and feathers will predict some of it other characteristics, based on our general understanding of birds.
When we communicate its quicker to say bird than describing it.
A phylogenic classification system alows us to infer evolutionary relationships
When describing the health of an eco-system or the rate of extinction in the geological record, conservationists often find it more useful to count families than species.
The 3 domain system
Bacteria that have an unusual metabolism
Plantae, Animalia and fungi
Familiar bacteria such as E.coil and salmonella and are prokaryotes.
Grouping closely related organisms together. Organisms in the same group have more recent common ancestor with each other than with organisms not in their group.
Relationship can be shown in a diagram called the phylogenetic tree.
The further up the diagram, the further forward in time.