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Chapter 1 (2) - Chapter 1 Introduction to life on earth...

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Chapter 1 – Introduction to life on earth What is the science of biology? o The study of life Principles underlying all science o All events can be attributed to natural causes Explanations don’t invoke supernatural powers Do not specifically exclude them; they just can’t be studied using science. o Natural laws apply at all places and all times. o People perceive events in similar ways. Misconceptions about science o Scientists “prove” things o “It is just a theory” o Science vs. religion The scientific method o Observation – something unexpected happens o Hypothesis – explanation; if/then prediction o Experiment – controlled test; challenge prediction o Conclusion – supports or doesn’t support hypothesis; if conclusion doesn’t support hypothesis you go back and modify hypothesis and start over. Penicillin o Fleming, 1920 o Culture dish became contaminated o Bacteria wouldn’t grow near Penicillium mold o Extracted fluid from mold o
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