BIO120H1 Lecture Notes - Lecture 3: Flightless Cormorant, Tiktaalik, Transitional Fossil
36
BIO120H1 Full Course Notes
Verified Note
36 documents
Document Summary
Lecture 3: what darwin saw: the evidence of evolution. Darwin finds fossils of extinct mammals in brazil: darwin befriended lyell and started looking at rocks, found fossils of mammals that no longer occur, the fossils were found in areas where similar species that existed now lived. Understanding evolutionary history: short branch coming off of common ancestor of amphibians, humans, branch off common ancestor, of humans, mammals, amphibians. Intermediate forms and temporal fossil record: evolution of birds from dinosaurs: evolution of birds from dinosaurs. Lessons from geology: earth is very old: allows for immense amount of time for biological evolution. Intermediate forms provide evidence for common ancestors linking features of living organisms: chimpanzees are not our common ancestor, they"re our cousins, fossils in younger strata increasingly resemble modern species in same region, while older strata show increasing differences. South america to east coast to galapagos islands.
