A biological system is a complex network of biologically relevant entities. ... Examples of biological systems at the macro scale are populations of organisms. On the organ and tissue scale in mammals and other animals, examples include the circulatory system, the respiratory system, and the nervous system. source: google
Nuclear fusion takes place at the core of the sun
higher. cancerous cells have a higher mitotic index than regular cells because the cells are constantly dying. hope this helps :)
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New information about the genetics of species is being discovered.