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Classifying Life

Classifying Life. Chapter 1 Lessons 2, 3. Bellringer. Have your homework on your desk! Read pg. 14 in your book and answer the questions. Why Do Biologists Classify Organisms. Classification Process of grouping things based on similarities

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Classifying Life

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  1. Classifying Life Chapter 1 Lessons 2, 3

  2. Bellringer • Have your homework on your desk! • Read pg. 14 in your book and answer the questions.

  3. Why Do Biologists Classify Organisms • Classification • Process of grouping things based on similarities • What characteristics were used to group the bees on pg. 15? • This makes studying organisms easier • Taxonomy • Scientific study of how organisms are classified

  4. Binomial Nomenclature • Carolus Linnaeus, a Swedish botanist, devised a system of naming organisms • Binomial Nomenclature • A system of naming in which each organism is given a unique two part name • Scientific Name-made of 2 Latin words italicized • EX: Homo sapians, Canis lupus, Felisdomesticus • Genus-1stword • contain similar closely related organisms • Species- 2ndword • group of similar organisms that can mate with each other and produce fertile offspring

  5. Levels of Classification • The more classification levels two organisms share, the more characteristics they have in common and the more closely related they are.

  6. Taxonomic Keys • Useful tools that help determine the identity of organisms • Dichotomous Key • Consists of a series of paired statements that describe various characteristics of the organisms

  7. Domains Bacteria and Archaea • Organisms are placed into domains based on cell type, their ability to make food, and the number of cells in their bodies • Bacteria and Archaea are both unicellular prokaryotes (prokaryotic) • This means they have no nucleus and no organelles • Archaea are found in extreme environments • Archaea are classified in their own domain because their DNA is very different from bacteria and they have a different cell structure

  8. Domain Eukarya • Eukaryotes • Organisms that have a nucleus and organelles Four Kingdoms • Protista • Fungi • Plants • Animals

  9. Domains of Life

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