BSC 114 Chapter Notes - Chapter 22: Continental Drift, Convergent Evolution, Biogeography
6 Dec 2016
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Section 22. 1: the darwinian revolution challenged traditional views of a young earth inhabited by unchanging species. Observations about the natural world: process of evolution consists of the mechanisms that produce the observed pattern of change. Represent natural causes of the natural phenomena we observe. Fossils- the remains or traces of organisms from the past: many are found in sedimentary rocks formed from the sand and mud that settle to the bottom of the seas, lakes, and swamps. Paleontology- the study of fossils: the older the strata, the more dissimilar its fossils were to current life form, from one layer to the next, some new species appeared while others disappeared. Inferred that extinctions must have been a common occurrence. If geologic change results from slow, continuous actions rather than from sudden events, then. Earth must be much older than the widely accepted age of a few thousand years. Giraffe stretching its neck to reach leaves.
