BIOL 1202 : Biology Exam 1
Document Summary
Hypothesis: statement that explains or makes generalizations about a set of facts or principles, usually forming a basis for possible experiments to confirm its viability. Theory: a system of rules, procedures, and assumptions used to produce a result. Organic molecules appear after only a few days. A few centuries ago : people thought that new living things appeared all of the time, 1609. Atmosphere: co2: ch4; nh4:h2; n2; hcl; h2s; h20, similar to jupiter today. Earth before life arose: earth is about 4. 6 billion years old. Radiometric dating of meteorites and moon rocks: life arose about 3. 8 billion years old ago, chemical traces in rocks 3. 8 b. y, fossil bacteria in rocks 3. 5 b. y, no spontaneous generation now, but must . Potassium 40 (40k) naturally decays to argon 40 (40ar) How to assemble a living thing: accumulation of organic molecules, protectoc soup, catalyze reactions speed up chemical reaction of all living things.
