BIOLOGY 1M03 Chapter Notes - Chapter 1: Capsaicin, Eukaryote, Estrous Cycle
10 Dec 2012
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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. Where cells come from: most scientific theories have two components. The first describes a pattern in the natural world. The second identifies a mechanism or process that is responsible for creating that pattern: the complete cell theory is. They could drop into the nutrient broth because the neck of the flask was straight.
