BIOL 1000 Chapter Notes - Chapter 2: Eukaryote, Endoplasmic Reticulum, Photosynthesis
30 Nov 2012
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The fundamental unit of life is the cell: 9/13/2012 3:19:00 pm: all organisms are composed of one or more cells. Some organisms (e. g. prokaryotes) are composed of a single cell. Unicellular organisms, the one cell is a functionally independent organisms capable of carrying out all life activities. In multicellular organisms (e. g. plants and animals), major life activities are divided among varying numbers of specialized cells: the cell is the smallest unit that has the properties of life. Although deoxyribonucleic acid (dna) and ribonucleic acid (rna) contain the information required to manufacture a vast array of biological molecules, they cannot orchestrate the formation of an entire cell. New cells can arise only from the division of preexisting cells. Figure 2. 4 page 25 shows examples of many different kinds of cells. The origins of information and metabolism 9/13/2012 3:19:00 pm. Out of the several critical events necessary for the development of life, two stand out: the origin of the information system:
