BIOL 1201 : Test 1 Notes
Document Summary
Hypothesis (explanation based on observation) vs theory (collection of tested hypotheses to predict the outcome of natural phenomenon) Razor is the simplest observation that is most likely. Didn"t exactly explain how life began on earth. A few centuries ago: people went out into the environment to make observations (no such thing as technology. Theory: the idea that living organisms could arise from inanimate matter ( spontaneous generation of lif e ) -no longer an accepted theory ( louis. Broth in in flask is boiled to kill preexisting mircoorganisms. Life did not spontaneously regenerate in the broth. Hypothesis: air was an element to trigger growth of life; living cells eat, grow, divide from preexisting life. All living cells come fr. preexisting cells. Ex: skin cells start from one cell as a diploid cell. More carbon dioxide than oxygen (less than . 1%) back then. Dates meteorites and moon rocks to predict age. Constant rate of loss change from one isotope to another.
