biol 1001 test one notes- chapters one through four

biol 1001 test one notes- chapters one through four -...

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August 31 Chapter One: Introduction to Life on Earth What is the Science of Biology? Principles Underlying All Science: All events can be attributed to natural causes Explanations don’t invoke deity Do not specially exclude deity Natural laws apply at all places and all times People perceive events in similar ways Make a deference between objective observations and subjective observations Science uses objective observations Misconceptions about Science: 1) Scientists “prove” things Scientists can never prove something to 100% correct 2) “It’s just a theory.” Common language a theory is just an educated guess In science a theory is an explanation of the natural world, supported by years of data 3) Science vs. religion Science is very good at explaining what happens in the natural world Religion deals with the super natural world – they determine what our moral and ethical values are One viewpoint doesn’t exclude the other viewpoint A Scientific Method: Observation Something unexpected happens Hypothesis Explanation: explain it in a if/then prediction - “If I can my battery, then my car will start” Experiment Controlled test Challenge prediction Conclusion Supports or doesn’t support hypothesis *If the conclusion doesn’t prove the hypothesis is correct then you must modify your hypothesis* Look at figure E1-1 in book. Penicillin:
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Fleming , 1920 Culture dish became contaminated Bacteria wouldn’t grow near Penicillium mold Extracted fluid from mold Fluid inhibited bacterial growth Later isolated as penicillin Scientific Theories: A general statement about how things operate Derived through inductive reasoning : individual observation to generalized statement Has survived through challenges Never permanent or final “truth” Always provisional (tentative) Always subject to change or replacement Used to propose hypotheses (deductive reasoning : generalized statement to individual observation) What are the Characteristics of Living Things? Characteristics of Living Things: 1) Complex and organized 2) Must get materials and energy 3) Homeostasis maintains internal conditions 4) Growth 5) Respond to stimuli 6) Reproduce themselves 7) Capacity to evolve Characteristics: Complex and Organized: Salt – organized but simple Oceans – complex but unorganized Water flea – organized and complex Levels of Biological Organization: Biosphere Ecosystem – all nonliving and living things living in one area Community – all the species living in one area Population Multicellular organism Organ system Organ Tissue Cell
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Organelle Molecule Atomic Subatomic * Need to know order for an exam!!* Characteristics: Respond to Stimuli: Change in internal environment Temperature Water level Blood sugar level Changes in external environment
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biol 1001 test one notes- chapters one through four -...

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