Evidence of Evolution, Lecture notes of Biology

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IY ® Chet $8. Evidence of evolution - Life on Earth arose 3.8 billitn years a90 ~ Scientists vse-the Geologie Himescole To divide he history of the Earth into cons § mms, based on evidence of Ibioloojcal £ geographical events - Evidence of evoluhion is Gasy to Find : ~ Researchers analyze fossils Anatomy, # molecular sequences to Jearn how species ore related to one another | >The events of evolution ore studied in context with the |___Qeologic timescale _/Ylants £ animals ofthe past left plenty of evidence == | 2Paleontplogiiistine study of fossil remains or other clues ES | Sarai, The remains of ancient organisms, provided +e | _origanal evidence Sor evolution al Ebr evidence for evolution come from comparing orqonisms | | = Even thovon tne events thot led to today's diversity of tie Ee OCCured nthe Past. Mony Ces suopest Xa oll organisms —_—_ aie __ derived from o common ansestor meee | a __|:Fossils record tualwtion,Pitcing, Xnoekner Eorth's Iniskory ___| =A fossil is evidence of on organism from more nary 10,00 years | _ago. The oldest are over Sbbillion years. O90 __|_-Fossils docurnent tne history of oll Whe on Forth __|_ Fossils also allow researtiners to test predictions about tuolvtion : - Even +novoln fossil Clidence is incomplete, it provides — ____|_ scientists with involuble informetion : __|_~ For example, snese marine Fossils ore common in dWohoma, —___|___ indicating Yok ne area used to be wnderr on ocean [Fossil msrory 1 wacom@lete _ ae a eee HVT_O Complete icrure_ f as he ; | [= Some. orpanisins (such 05 nose wil sett bodies) ssilize_ il i A a CSS 2 See ee a destroy fossils