Classifying Organisms 4/11/12. Classification – the process of grouping things based on their similarities.

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Presentation transcript:

Classifying Organisms 4/11/12

Classification – the process of grouping things based on their similarities.

Why Classify? Biologist use classification to organize living things into groups so that the organisms are easier to study.

Taxonomy – the scientific study of how living things are classified.

Early Systems of Classification Aristotle put animals into three groups: Those that fly Those that swim Those that walk, crawl, or run

Classification of Linnaeus Linnaeus’s naming system to classify organisms was called binomial nomenclature. 2 part names: genus and species.

Early Systems of Classification Genus – classification grouping that contains similar, closely related organisms. Ex. Pumas, ocelots, and house cats are all classified in the genus Felis.

Species – group of similar organisms that can mate and reproduce fertile offspring in nature. Ex. Pumas and mountain lions have the name Felis concolor meaning the same color.

7 Levels of Classification Today Today biologists have organized organisms into 7 levels: Kingdom Phylum Class Order Family Genus Species King Phillip Came Over For Good Spaghetti

Taxonomy Key Taxonomy key – series of paired statements that describe the physical characteristics of different organisms. Taxonomy key

Evolution and Classification Evolution – change over time. Charles Darwin (1859) – He had the idea that finches from South America flew to some islands nearby and began to change over time.