BIOL 211- Midterm Exam Guide - Comprehensive Notes for the exam ( 16 pages long!)
6 Oct 2017
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Document Summary
Stratigraphy- layers of rock closer to the surface are younger, further below are older. Radiometric dating- read 437&438 in text, provides absolute dates; used in igneous rocks; measuring the time since molten rock cooled sufficiently to prevent loss of the daughter isotope. Carbon dating- specific type of radiometric dating; fossil or artificat is being dated not the surrounding rock; usable to 50,000 years before the present; margin of error is typically less than 10% Fact- something that can be observed to occur. Hypothesis- prediction about with will happen in a certain set of circumstances; can be based on considerable previous knowledge or little previous knowledge (guess) has to be possible to test. Law- universal relationship describing how the natural world behaves under specific conditions; can often be express mathematically. 3,800-3,500 mya- origin of life oldest prokaryotic fossils 3,500 mya. 2,000 mya first eukaryotic cells prokaryotic cells- no nucleus but have circular dna eukaryotic cells- possess a nucleus with linear dna.
