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Chapter 18 Classification
Transcript of Chapter 18 Classification
What are the goals of biologists who classify living things? The National Science Foundation’s “Tree of Life” project estimates that there could be anywhere from 5 million to 100 million species on the planet, but science has only identified about 2 million To provide a Universal Scientific Name for each species
Why ? Show evolutionary relationships
Systematics Carolus Linnaeus 1730's
2 kingdoms (plants and animals)
Genus species (underline or italics)Ex.1 Humans: Homo sapiens
Ex. 2 Ameoba: Chaos chaos
7 taxa (kingdom, phylum, class, order, family, genus & species. What does it mean to classify?
What things do you classify? History Cougar, Puma or Mountain Lion? Which is a fish? silverfish starfish jellyfish None of them ! Depends on
are from! Modern Classification
based on evolutionary relationships
dna and protein comparisons
autotroph or heterotroph
photosynthetic or chemosynthetic Descendents of Common Ancestors
Monphyletic groups 3 Domains 6 Kingdoms Cladograms