1 / 35

Diversity of Organisms

Diversity of Organisms. 5 to 30 million species estimated. Axolotl. Organisms alive today descended from earlier species. Fossils Remains of previous forms Record of life’s history Life on Earth Single cell organisms for 3.5 billion years

rbernal
Download Presentation

Diversity of Organisms

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Diversity of Organisms • 5 to 30 million species estimated Axolotl

  2. Organisms alive today descended from earlier species • Fossils • Remains of previous forms • Record of life’s history • Life on Earth • Single cell organisms for 3.5 billion years • Abundant multicellular life for 500 million years

  3. Evolution • Change is species over time • Organisms alive today descended from older organisms • Evidence is overwhelming

  4. Organization of the Living World • System to deal with millions of species • An organism belongs to a unique species Bird’s nest fungi

  5. Organization of the Living World • Species designated by a scientific name • Binomial nomenclature – two part name • Developed by Carolus Linnaeus • Example: Homo sapiens • Homo = genus name • sapiens = species name

  6. Classification • System to organize life • Classification System • Genus = closely related species • Family = closely related genera

  7. Classification System Largest Level • Domain • Kingdom • Phylum • Class • Order • Family • Genus • Species Smallest Level

  8. Methods of Classification • Common ancestry is basis for classification • Taxonomy = science of classifying organisms • Systematics • Study of diversity of organisms • Based on evolutionary relationships

  9. Domains of Life • Archaea • Bacteria • Eukarya

  10. Cell Types of Organisms • Prokaryote • No membrane bound organelles • Genetic material found in a nucleoid • Eukaryote • Membrane bound organelles • Genetic material in a nucleus

  11. Archaea • Originally thought to be bacteria • Live in extreme habitats • Do not cause disease • Prokaryotic • Unicellular

  12. Bacteria • Found nearly everywhere • Some cause disease • Prokaryotic • Unicellular

  13. Eukarya • Unicellular or Multicellular • Eukaryotic cells • Divided into at least four kingdoms • Protista • Fungi • Plantae • Animalia

  14. Kingdom Protista • Mostly single cell organisms • May actually be up to 20 kingdoms • Gave rise to other eukaryotes

  15. Kingdom Fungi • Most are multicellular • Absorptive heterotrophs • Most are saprophites

  16. Diversity of Organisms • 5 to 30 million species estimated Axolotl

  17. Organisms alive today descended from earlier species • Fossils • Remains of previous forms • Record of life’s history • Life on Earth • Single cell organisms for 3.5 billion years • Abundant multicellular life for 500 million years

  18. Evolution • Change is species over time • Organisms alive today descended from older organisms • Evidence is overwhelming

  19. Organization of the Living World • System to deal with millions of species • An organism belongs to a unique species Bird’s nest fungi

  20. Organization of the Living World • Species designated by a scientific name • Binomial nomenclature – two part name • Developed by Carolus Linnaeus • Example: Homo sapiens • Homo = genus name • sapiens = species name

  21. Classification • System to organize life • Classification System • Genus = closely related species • Family = closely related genera

  22. Classification System Largest Level • Domain • Kingdom • Phylum • Class • Order • Family • Genus • Species Smallest Level

  23. Methods of Classification • Common ancestry is basis for classification • Taxonomy = science of classifying organisms • Systematics • Study of diversity of organisms • Based on evolutionary relationships

  24. Domains of Life • Archaea • Bacteria • Eukarya

  25. Cell Types of Organisms • Prokaryote • No membrane bound organelles • Genetic material found in a nucleoid • Eukaryote • Membrane bound organelles • Genetic material in a nucleus

  26. Archaea • Originally thought to be bacteria • Live in extreme habitats • Do not cause disease • Prokaryotic • Unicellular

  27. Bacteria • Found nearly everywhere • Some cause disease • Prokaryotic • Unicellular

  28. Eukarya • Unicellular or Multicellular • Eukaryotic cells • Divided into at least four kingdoms • Protista • Fungi • Plantae • Animalia

  29. Kingdom Protista • Mostly single cell organisms • May actually be up to 20 kingdoms • Gave rise to other eukaryotes

  30. Kingdom Fungi • Most are multicellular • Absorptive heterotrophs • Most are saprophites

  31. Kingdom Plantae • Multicellular • Photosynthetic autotrophs

  32. Kingdom Animalia • Multicellular • Heterotrophs

More Related