1. The Origin of Life Life originated 3.5-4.0 billion years ago! What came first: prokaryotic cells or eukaryotic cells?

2. Prokaryotes Prokaryotes dominated life on Earth from 3.5-2.0 bya! – The 1 st actual cells 3.5 billion year old fossil of bacteria Modern bacteria Chains of unicellular cyanobacteria

3. The Origin of Eukaryotic Cells

4. Bacteria were the starting point for all the life we have today!

5. How many species exist on Earth? We don’t know an exact number  – MILLIONS More still waiting to be discovered! How do we keep track of all of them?

6. Classifying Organisms

7. Devil Cat

8. Ghost Cat

9. Mountain Lion

10. Screaming Cat

11. Puma

12. Florida Panther

13. Cougar

14. All the same species! There are at least 50 different names for the species of cat shown before. – Different places have different names. Scientific name: Felis concolar – Why is it important to have scientific names?

15. Scientific Names Give species an “official” name Come from “dead” languages – Latin or Greek We get the names from the way the organisms are classified. Solenopsis invicta

17. Taxonomy Classifying Living Organisms

18. Taxonomy The science of classifying organisms – Show how organisms are related – Provides a universal system for identifying organisms – Provides scientific names We use the Linnaean system for classifying organisms.

21. A good way to remember… King Phillip Came Over For Good Soup

22. What is the order of the Linnaean classification system? A.Kingdom, Phylum, Genus, Class, Order, Family, Species B.Kingdom, Family, Phylum, Genus, Order, Class, Species C.Kingdom, Phylum, Class, Genus, Order, Family, Species D.Kingdom, Phylum, Class, Order, Family, Genus, Species King Phillip Came Over For Good Soup Kingdom, Phylum, Class, Order, Family, Genus, Species

23. Linnaean Classification System for classifying organisms by hierarchy - goes from broad to specific!

24. All Living Species AnimaliaPlantaeFungiProtistaEubacteriaArchaebacteria All living species can be broken down into 6 kingdoms: 1.Animalia 2.Plantae 3.Fungi 4.Protista 5.Eubacteria 6.Archaebacteria Each of these kingdoms can be broken down into phylums!

26. Human Linnaean Classification Notice how we went from broad categories to specific categories!

27. Kingdom Animalia contains many species! Some animals have a backbone, some don’t. Phylum Chordata (backbone) includes several mammals. Some mammals are carnivores. Several carnivorous mammals are bears. Some bears are more closely related than others… We’ve narrowed it down to a specific species!

28. Binomial Nomenclature Formal system for naming species – Latin or Greek – Italicized – Genus species Turdus migratorius, or American Robin 

29. What genus does the American Robin belong to? Turdus! Remember that species get their scientific names from their classification – Genus species A.American B.Robin C.Turdus D.Migratorius Turdus migratorius 

30. Which species are more closely related? Polar & Grizzly Bear – they belong to the same genus! A.Panda & Polar Bear B.Polar Bear & Grizzly Bear C.Grizzly Bear & Panda

31. Which of the following is true? A.All animals are chordates. B.All felines belong to the genus Panthera. C.All chordates are mammals. D.All felines are carnivores.

32. Which category in the Linnaean System is the most specific? A.Phylum B.Family C.Class D.Genus Genus!

33. 33 Broad Specific copyright cmassengale