CLADOGRAMS CHAPTER 18 SECTION 2

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Presentation transcript:

CLADOGRAMS CHAPTER 18 SECTION 2 THE STUDENT WILL USE A PHYLOGENETIC TREETO IDENTIFY THE EVOLUTIONARY RELATIONSHIPS AMONG DIFFERENT GROUPS OF ORGANISMS

Taxonomy dfn: discipline of classifying organisms & assigning each organism a universally accepted name taxon: group or level of organization into which organisms are classified ex: Genus Homo is a taxon in the classification of humans

Binomial Nomenclature each species is assigned a 2 word scientific name: consists of the Genus & species Genus name is capitalized species name is not capitalized both in italics Ex: Homo sapiens

3 Domains

Classification of Living Things

Classification of Living Things Linneaus’s hiearchical system based on physical similarities now, organisms grouped into categories that represent lines of evolutionary descent or, phylogeny

Phylogeny evolutionary classification: strategy of grouping organisms together based on their evolutionary history

Cladograms Most biologist now use a method called Cladistic Analysis method uses only those characteristics that are evolutionary innovations Derived Characters: present in recent parts of a lineage but not in its older members Use them to construct cladogram

Cladogram

Quick Lab Notebook page 129 Book: page453 Construct cladogram using information given

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