18th century - first to propose that could change over time and that changes could - proposed that relatively had formed many through.

Transcription

1 Early Ideas About Evolution 1795 proposed Same occurring in the also occurred in the. - Hutton explained the of landforms as the result of. Contrasts 18th century - first to propose that could change over time and that changes could - proposed that relatively had formed many through.

2 Using Hutton s ideas proposed. - Theory that and to change through processes. - The work of Hutton and Lyell led to two significant conclusions: - that and - that over such extremes of time through processes.

3 19th century - was the first to recognize the key in evolution. He reasoned that in order for over long periods of time, to the changing. -Where he went wrong was that he believed and that new simple species were continually being created by (living arise from non-living) - He believed in or those changes in an individual resulting from - EX.

4 In 1831 Darwin boarded H.M.S. Beagle as a naturalist for a. - Darwin was taken on the trip in hope that he would find evidence to. - He collected and recorded of journal entries

5 - The most important stop on the voyage was to the - Here he found that the but seemed to have its. - At the time he failed to realize that each of plants and animals. - Ex. Darwin s Finches

6 When Darwin returned to England, he was full of enthusiasm and questions. His subsequent over the next led him to write the most : Darwin would he had observed in his travels and would provide for his theory of evolution.

7 What Darwin Observed Many unusual fossils resembled in the same region. Ex.

8 Of the 13 finches he brought back from the Galapagos, none found and all similar to. 1. Large cactus finch (Geospiza conirostris) 2. Large ground finch (Geospiza magnirostis) 3. Medium ground finch (Geospiza fortis) 4. Cactus finch (Geospiza scandens) 5. Sharp-beaked ground finch (Geospiza difficilis) 6. Small ground finch (Geospiza fuliginosa) 7. Woodpecker finch (Cactospiza pallida) 8. Vegetarian tree finch (Platyspiza crassirostris) 9. Medium tree finch (Camarhynchus pauper) 10. Large tree finch (Camarhynchus psittacul) 11. Small tree finch (Camarhynchus parvulus) 12. Warbler finch (Certhidia olivacea) 13. Mangrove finch (Cactospiza heliobates)

9 The Galapagos contained like lizards and turtles.. Led to ideas about.

10 Darwin not only compared species based on but also was interested in comparing He found that body parts with. HOMOLOGOUS FEATURES. All of these parts include the.

11 Evolution Assignment 2 - Activity Biology 12 LOOKING FOR HOMOLOGIES

12 ANALOGOUS FEATURES are structures. The wings of, or the eyes of were observed to be different in internal anatomy.

13 Darwin concluded that organisms with homologous features Sometimes homologous features only appear during

14

15 These similarities were first noted biologist Mayr noted if evolution is not true, "why should the embryos of?" Darwin also studied numerous. Theses are structures that Ex.1 The digits in dogs, pigs and horses.

16 Ex. 2 - Ex. 3 -

17 Ex 4.! Ex. 5 -.

18 Ex Ex. 6 -.

19 Ex. 7 -

20 With our knowledge of, we have now found a. Genes that do not but are almost identical to those that are. L-gulano-γ-lactone oxidase gene, required for, is found in

21 Based on DNA sequences for this in chimpanzees, orangutans, and macaques the is most similar to, followed by, and then, precisely as evolutionary theory.