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StudyGuideExam2

StudyGuideExam2 - Study guide Exam 2 What were Darwin's...

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Study guide – Exam 2 What were Darwin’s beliefs before he left on his trip on the Beagle? Special Creation Theory, he believed in the biblical explanation of life. What kinds of observations did Darwin make on his voyage that made him question if the physical world was unchanging? He realized that most animals come from a common ancestor but adapt to the environment they live in. He realized the physical world isn’t what forced species to adapt it was the surroundings they lived in. If the physical world changes, what does that imply about animals? What were the main tenants of Darwin’s theory of evolution? Like begets like with variations within the offspring. More offspring are produced than can survive. Individuals in a population vary. Survival of the fittest . Nature selects those varieties best fit for survival. How can we use the fossil record to look for evidence of species changing across time? Rock Layer Fossil Species Alive Today % of fossil species alive Youngest 226 216 96.00% Next Youngest 569 238 42.00% Next Oldest 1021 176 17.00% Oldest 1238 42 3.00% What sort of evidence is presented in the table? correlational Based on special creation theory, the percentages in the third column (far right) of the table above should stay the same from layer to layer. Based on special creation theory, the numbers in the first column (Fossil Species column) should stay the same from layer to layer. Based on evolution theory, the numbers in the first column should increase as we move from the oldest to the youngest layers. Based on special creation theory, the numbers in the second column (Alive Today column) should increase as we move from the oldest to the youngest layers.
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