11:709:255 Lecture Notes - Lecture 12: Archaea, Bacteria, Cell Theory
24 Apr 2020
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Document Summary
Take in nutrients and transform energy to do work. Cell - a basic unit of living matter separated from its environment by. The smallest unit able to carry out life processes: Thought to be the first cells to evolve. Most too small to be seen without a microscope. Invention of the light microscope in 17th century led to the cell. A cell is the basic unit of life. All living organisms are made up of cells. Small cells : larger surface area compared to the volume. Larger surface area more nutrients into a cell and wastes out of a cell. There is a limit to how large a cell call be, and be an efficient and metabolically active cell. Ratio of surface area to volume decreases as cell size increases. Ex: 1 large cube-shaped cell, 4cm on a side vs. 64 small cube-shaped cells, 1cm on a side.
