BIOLOGY 1M03 Chapter Notes - Chapter 1: Beer Engine, Growth Medium, Antonie Van Leeuwenhoek
15 May 2017
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Chapter 1: biology and the tree of life. Robert hooke used a crude microscope to examine the structure of cork (bark tissue) from an oak tree. In the cork, he observed small, pore-like compartments that were invisible to the naked eye, which came to be called cells. Anton van leeuwenhoek developed a much more powerful microscope and made the first observations of single-celled organisms like paramecium. Today, a cell is defined as a highly organized compartment that is bounded by a thin, flexible structure called a plasma membrane and that contains concentrated chemicals in an aqueous solution. The chemical reactions that sustain life take place inside cells. In this way, all of the cells in a multicellular organism are connected by common ancestry. Darwin and wallace claimed that: species are related by common ancestry, characteristics of species can be modified from generation to generation.
