BILDSTUDY7

BILDSTUDY7 - 23:36:00 ← Lecture 2 ← ← Classification...

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Unformatted text preview: 08/12/2009 23:36:00 ← Lecture 2: ← ← Classification- role of a scientist was to better understand god’s plan Linneaus ← Geology Hutton, Lyell ← Paleontology Cuvier –extinction, catastrophism ← Evolution Lamarck – use/disuse changes are inherited ← Economics Malthus – human population growth was faster than increase in food production will cause widespread famine ← Cape Verde Islands- A ring of white sedimentary rock containing marine shells occurs around the islands about 45 ft. above sea level. Darwin reasoned there must have been uplift, with the old seafloor now raised above sea level ← Brazil- Darwin’s first exposure to wet tropical environments- amazed at diversity; Discovered the bones of giant ground sloth, giant armadillos, extinct recognized these were similar to smaller living forms (law of succession) ← Tierra Del Fuego-Fuegains on bord the Beagle convinced Darwin there where no real differences in the abilities between races of men ← Falklands- only dog like species on islands as remote as falklands, how did it get there? Land must have been different ← Chile- Found fossil marine shells in sediments at 12,000 ft, witnessed volcanic eruption and a massive earthquake, Darwin “seeing the world through Lyell’s eyes”= that forces observable today can create what we see around us, given enough time. ← Galapagos- tortoise- carapace shape varies from island to island, noticed and collected finches- extreme variation in beak size. ← ← ← ← Lecture 3: Evidence of Evolution: ← I. EVIDENCE OF CHANGE OVER TIME ← A. Fossil record ← 1. Extinction ← a. Extinction controversy ended in 1812 with Irish elk – lived during a ← warm period between two ice ages. ← 2. Law of succession a. fossils in one region are similar to extant (living organisms in that same ← region) ← 3. Transitional forms ← a. Are not necessarily ancestors of modern forms, but are important in ← showing how change might happen. ← b. Ex. Tiktaalik- fish & tetrapods ← c. Ex. Archaeopteryx dinosaurs & birds ← d. Ex. Microraptor- transition to flight ← B. Vestigial organs ← 1. functionless or rudimentary organ in one species that has important function in other species ← 2. Vestigial eyes Ex. Mexican tetra, Blind cave tetra ← 3. Ex. Flightless birds still have wings ← 4. Ex. Human goose bumps- defense mechanism in ancestor-makes hair ← stand up....
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BILDSTUDY7 - 23:36:00 ← Lecture 2 ← ← Classification...

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