BIOL 1001 Lecture Notes - Lecture 1: Peptic Ulcer, Carl Woese, Robin Warren
Document Summary
Biol 1001 symbiosis lecture week 1&2 (january 4 15) Chapter 3. 1 & 3. 2: evolution by natural selection (pg. Chapter 6. 2 & 6. 4: phylogenies and the history of life (pg. An organism is a life form a living entity made u of one or more cells. Hypothesis a proposed explanation for a phenomenon: good hypothesis leads to testable predictions (sometime hypothesis = fake). The cell theory and the theory of evolution established 2 of the 5 attributes of life: organisms are cellular, organisms populations change over time. Theory proposed explanations for broad patterns in nature. Hypothesis explanations for more tightly focused questions. Prediction something that can be measured and that must be correct if a hypothesis is valid. Experiment: two treatment groups were created, a broth exposed to a source of pre-existing cells, a broth without any pre-existing cells, heat sterilization step. Conclusion: the spontaneous generation hypothesis was rejected, the flask with no pre-existing cells resulted in no living material.
