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Transcript
History of Evolution Notes What is Evolution Evolution- change over time, is the process by which modern organisms have descended from ancient organisms. Jean-Baptiste Lamarck (17441829) Zoologist, forunner of evolution First person to create a theory on evolution Incorrect Theories: 1. Simple life forms continually come into existence from other life forms. 2. Life forms continually become more complex or more perfect as they transform into new species CORRECT THEORY 3. Change in species is linked to an organism’s environment. Though today Lamarck's work is considered a major step forward, in his lifetime he did not receive much recognition. Thomas Malthus (1766-1834) Realized that producing more offspring than can survive establishes competition among a species. Populations grow as much as the environment allows Influenced Darwin & Wallace’s theory of natural selection & evolutionary change Alfred Russel Wallace (1823-1913) Came to the same conclusions as Darwin during the same time frame Co-published theory of natural selection/evolution Charles Darwin (1809-1882) Charles Darwin (1809-1882) Who was Charles Darwin? (Video facts) Made observations & collected data during Voyage of the H.M.S Beagle (S.America and Pacific Ocean) 1859: Published “Origin of the Species” Darwin’s Observations on the Galapagos Islands: Species resembled those of the nearby islands but had evolved differences He called this descent with modification after separating from a common ancestor. Darwin’s Ideas Natural Selection states that a struggle for life exists causing individuals with favorable characteristics to survive while the other would become extinct (Survival of the Fittest) Galapagos Islands