BIOL 211 Chapter 22: Chapter 22 Darwinian Evolution idea 1
15 Apr 2018
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Document Summary
At the age of 22, voyaged around the world on the beagle. As the ship"s naturalist, darwin collected biological materials of all kinds (including fossils) from many places. Collected extensively in the galapagos islands in the eastern pacific. Returned to england in 1836 and spent the next 23 years analyzing data and interpreting results. Result of this work was a book describing 2 concepts. And he provided lots of evidence supporting these ideas. All living things share a common ancestry (descent) Current species are descended from ancestral species. The species inhabiting the earth have changed through time (modification) Lineages split or speciate, increasing the number of different organisms. All living things share some fundamental traits. Similarity as a result of share a common ancestor. Another line of evidence comes from homologies. Homology is a similarity that exists in species descended from a common ancestor.
