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Classification

Classification. All Living Things Share Common Characteristics. All living things are made of Cells They all Reproduce All are Based On Universal Genetic Code ( DNA) Grow & Develop Obtain & Use Energy. Respond to their environment Maintain a stable internal conditions – HOMEOSTASIS

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Classification

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  1. Classification

  2. All Living Things Share Common Characteristics • All living things are made of Cells • They all Reproduce • All are Based On Universal Genetic Code (DNA) • Grow & Develop • Obtain & Use Energy

  3. Respond to their environment Maintain a stable internal conditions – HOMEOSTASIS AS A GROUP, living things Evolve or Change over time All Living Things Share Common Characteristics

  4. Organisms are grouped by their cell structure • Prokaryotes • DO NOT have a nucleus or membrane-bound organelles • Eukaryotes • These cells DO have a nucleus and membrane-bound organelles

  5. Organisms are Grouped by their Number of Cells • Unicellular Organisms • Living Organism Made Up Of One Cell (single-celled) • Multicellular Organisms • Living Organism Made Up Of Many, Specialized Cells

  6. Food Requirements • Autotrophs are organisms that can make their own food

  7. Food Requirements • Heterotrophs can NOT make their own food • They must consume other organisms to get energy

  8. Linnaean System of Classification • Linnaeusintroduced the system of classification used today.

  9. What is Classification? • Taxonomy is the science of naming and classifying organisms. Kingdom Phylum Class Order Family Genus Species

  10. Why Classify & Use Scientific Names • Accurately & uniformly names organisms • Prevents confusion found in common names: • starfish & jellyfish that aren't really fish • Uses same language (Latin) for all names Sea”horse”??

  11. Standardized Naming • Binomial nomenclature is the system used for naming organisms. • Scientific Name consists of theGenus and the species • Rules for writing a scientific name correctly: • Capitalize genus, but NOT species • In italics when typed • Underlinewhen written

  12. Binomial Nomenclature

  13. Dichotomous Key • Used to identify organisms • Characteristics given in pairs • Read both characteristics • Choose “either/or” for the characteristic the organism has • go to another set of characteristics OR identify the organism

  14. 1a Tentacles present – Go to 2 1b Tentacles absent – Go to 3 2a Eight Tentacles – Octopus 2b More than 8 tentacles – 3 3a Tentacles hang down – go to 4 3b Tentacles upright–Sea Anemone 4a Balloon-shaped body–Jellyfish 4b Body NOT balloon-shaped - 5 Example of Dichotomous Key

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