BIO 200 Lecture Notes - Lecture 5: Transitional Fossil, Radiometric Dating, Radiocarbon Dating
3 Jun 2019
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Document Summary
The next several lectures deal with the current evidence showing unequivocally that evolution by natural selection has occurred. Until radioactive methods were developed, geologists did not know the absolute dates of rocks, fossils and the earth. They could determine only their relative ages by noting that the oldest layers must be the deepest ones. In the 1950"s with the aid of radioactive dating the real ages of rocks could be established. You need to be able to explain this system of measurement. You need to be able to give at least 3 reasons why scientists believe the system is accurate. You need to be able to explain what a transitional fossil is and why it is important. You need to be able to identify why transitional fossils are hard to find. Darwin identified several reasons and we now can list more.
