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From Bacteria to Plants Chapter 1.2/1.3 Classifying Organisms

From Bacteria to Plants Chapter 1.2/1.3 Classifying Organisms. Do You Classify Objects?. How would you classify the items in this classroom? Why would it be important to classify things?. Why Do Scientists Classify?. Classification: grouping things based on their similarities .

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From Bacteria to Plants Chapter 1.2/1.3 Classifying Organisms

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  1. From Bacteria to PlantsChapter 1.2/1.3Classifying Organisms

  2. Do You Classify Objects? How would you classify the items in this classroom? Why would it be important to classify things?

  3. Why Do Scientists Classify? • Classification: • grouping things based on their similarities. • organize living things so organisms are easier to study • Taxonomy: • The study of how living things are classified.

  4. Using the Classification System • Taxonomic Key • Series of paired statements • Describe the physical characteristics of different organisms

  5. 1st word: Genus similar organisms Ex: Types of Cats 2nd word: Species smaller groups Ex: Lions, Pumas, Housecats • Carolus Linnaeus • placed organisms into groups based on observable features • Named organisms with binomial nomenclature - a 2 part name

  6. GenusSpecies Example: Felis domesticus Types of Cats House Cat

  7. The 8 Levels of Classification • Aristotle and Linnaeus invented today’s classification system in this order: • Domain (Broadest) • Kingdom • Phylum • Class • Order • Family • Genus • Species (Narrowest)

  8. Charles Darwin’s Hypothesis:over time a species gradually changes-known as evolution • Studied Finches • Finches flew from South America to the Galapagos islands • Adapted to the new environment • Reproduced • New generation changed slightly to survive in that environment Ex: different beaks 5.Finches changed to create new species

  9. 3 Domains of Life Archaea- -Prokaryotes -No nucleus -Different chemistry Eukarya- -Eukaryotes -Have nucleus -Protists -Fungi -Plants -Animals Organisms are placed in domains and kingdoms based on: Cell type Ability to make food Number of cells in their body Bacteria -Prokaryotes -No nucleus -Harmful-strep -Helpful-yogurt

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