09 - Lec. 1: The Cell Theory 1/4/09 1) In the late 1660s,...

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Lec. 1: The Cell Theory 1/4/09 1) In the late 1660s, Robert Hooke and Anton can Leeuwenhoek were the first to observe cells 2) a cell is a highly organized compartment bounded by a plasma membrane that contains concentrated chemicals in an aqueous solution Components on Biological Theories 1) pattern: all organisms are made of cells 2) process: cells originate from pre-existing cells A. Where do cells come from? The cell theory states that all organisms are made of cells and all cells come from preexisting cells. Alternate theory was spontaneous generation -- disproved by Pasteur 1) Null hypothesis: cells arise by spontaneous generation in nutrient rich nonliving materials conclusion: cells arise only from preexisting cells, not spontaneously from nonliving material B. Scientific Method 1) Hypothesis is a proposed explanation 2) A prediction is something that can be measured and must be correct if a hypothesis is valid 3) A properly designed experiment must be capable of falsifying a hypothesis C. The Theory of Evolution by Natural Selection
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This note was uploaded on 11/19/2010 for the course BIOLOGY 93 taught by Professor O during the Spring '08 term at San Diego.

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09 - Lec. 1: The Cell Theory 1/4/09 1) In the late 1660s,...

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