Biology 1B Evolution John Huelsenbeck Alexander Fleming 1881 1955 Staphylococcus aureus Bacterial lawn is yellow tinged Note zone of inhibition by Oxacillin disk Pseudomonas aeruginosa The greenish tint to the bacterial lawn is caused by the bacteria itself Well defined margin of inhibition around disk The small zone of inhibition around this Ceftriaxone disk is interpreted as resistance 7 1816 31 1840 71 1880 45 1854 65 1874 Westminster Abbey Marine Iguana Galapagos Tortoise Land Iguana A Darwin Finch Chihuahua Great Dane Golden Retriever Sheep Dog Wolf Biogeography The study of the geographic distribution of organisms A Distribution of species or kinds on continents New World Old World Observation Greater similarity within a continent than between continents even in comparison of similar habitats Example New world and old world monkeys Platyrrhines New World Monkeys Catarrhines Old World Monkeys South America Flat nosed with nostrils having a wide septum 3 premolars Europe Africa Asia Hook nosed with nostrils closer together and pointing down 2 premolars Cotton Top Tamarin Snow Monkey B Island Biogeography Darwin s four observations 1 Oceanic islands have a low diversity of kinds 29 bird species on the Galapagos vs 100 species on the Berkeley campus 2 There is a bias in the presence of certain kinds e g Darwin s Finches 14 of the 21 endemic bird species on Galapagos are finches 3 The most similar kind to oceanic forms are found on the nearest continent 4 There is a bias in the types of species found on oceanic islands found plants not found amphibians insects fresh water fish birds mammals reptiles some reptiles most b T3 T2 X1Hbox mutant
View Full Document
Unlocking...