Why is taxonomy important?

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Presentation transcript:

Why is taxonomy important? Remember! Science changes all the time – nothing is concrete! Unknown species are being discovered! New fossils are being uncovered! How would these new discoveries affect our classification systems?

Cladograms/Phylogenetic Trees Diagrams showing evolutionary relationships between species Like a family tree of species constructed using morphology & DNA evidence

Cladograms Important features of cladograms are: Derived Characteristics: recently evolved characteristics of organisms being compared Ancestral Characteristics: shared characteristics of all the organisms being compared

Ancestral Characteristics: vertebrae Derived Characteristics: hair, amniotic egg, etc.

According to this cladogram, who are rabbits most closely related to? Crocodiles Amphibians Primates Birds

Which organisms are birds the least related to? Crocodiles Ray-finned Fish Sharks Primates Sharks!