Classification Notes (cont.). As we move from kingdom to species, organisms within each taxon become more similar to one another. Taxon: A group of similar.

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Presentation transcript:

Classification Notes (cont.)

As we move from kingdom to species, organisms within each taxon become more similar to one another. Taxon: A group of similar organisms

How do we classify? By cell structure, food-getting methods and metabolism, external coverings. DNA and genetic code is increasingly more important. Classification of organisms is not perfect-some organisms are reclassified when more is learned about them. Some have even suggested adding more kingdoms.

Level of Classification HumanDomestic CatGrizzly Bear KingdomAnimalia PhylumChordata ClassMammalia OrderPrimatesCarnivora FamilyHominidaeFelidaeUrsidae GenusHomoFelisUrsus Speciessapienssilvestris (domesticus) arctos 1.At which taxon do you start to see differences? 2.Which two of the three organisms are more related? 3.At what point do the classifications of the cat and grizzly bear diverge?

Binomial Nomenclature (two name naming) Every scientific name is made of two words (binomial) First word is Genus is capitalized Second word is Species name and is lowercase Genus functions as a noun, Species functions as an adjective. -Genus: noun -Species: adjective Examples: Genus Homo sapiens species Genus Felis silvestris species Genus Ursus arctos species

Be able to look at a scientific name and determine which two organisms are the most closely related. Of the three choices below, which two are the most closely related? I. Red hat II. Blue hat III. Red ball

Answer: the Red hat and the Blue hat. They are closest related because their nouns are the most similar. The adjective only describes the noun. Now, which of the following three pairs are the most closely related? Why? I. Mus domesticus Musca domestica II. Galleus domesticus Mus domesticus III. Felis concolor Felis rufus

Answer: Pair 3 Genusspecies of a particular genus 1.Mus domesticusmouse Musca domesticafly 2. Galleus domesticuschicken Mus domesticusmouse 3. Felis concolorcougar Felis rususbobcat NounAdjective If someone asks you which organisms are most similar, look for ones with the same “noun” as 1 st word.