BIOLOGY 1M03 Lecture Notes - Lecture 2: Disclose, Archaea, Carl Linnaeus
10 Aug 2018
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Chapter 1: biology and the tree of life. The cell theory: a cell is a highly organized compartment bounded by a plasma membrane that contains concentrated chemicals in aq solution. All cells have a plasma membrane: the cell theory states that all organisms are made of cells and all cells come from pre-existing cells, within a multicellular individual, all cells are descended from a progenitor cell- the zygote. Some essential features of cells: cells contain molecular info (dna) that encodes physical attributes (some cells loose dna, cells have a boundary between them and environment, cells have the ability to harness materials and/or energy. Designed to test the spontaneous generation hypothesis: observation: maggots appear in meat when left out, null hypothesis: maggots arise spontaneously, alternate hypothesis: flies lay eggs on meat, which grow into maggots. Another experiment to test cell theory with micro organisms.
