5. Carolus Linnaeus
1707 - 1778
Swedish botanist
Formed a uniform system
in classifying organisms
6. Key Terms
Taxonomy
Discipline of classifying organisms and assigning each organism
a universally accepted name
Binomial Nomenclature
Scientific name
First word – capital letter; second word – lower case
Homo sapiens
Taxon
Group or level of organization
7. Example of classifications
Mnemonics Humans Bear
Kingdom Animalia Animalia
Phylum Chordata Chordata
Class Mammalia Mammalia
Order Primata Carnivora
Family Hominidae Ursidae
Genus Homo Ursus
Species Sapiens arctos
8. Kingdom of Organisms
2 Kingdom System
Proposed by Aristotle
Plants and Animals
3 Kingdom System
Proposed by Haeckel
Plants, Animals, Protists
12. Viruses
Parasites that enter the cell
Reproduce only in a host cell
Composed of nucleic acids and a protein coat
Can be seen only with an electron microscope
Acellular