![]() They also have specialized cellular components called organelles, each of which executes a specific task. Their genetic material is packaged into a central nucleus. Plants, animals and fungi are all eukaryotes and have highly ordered cells. Based on these differences, organisms are divided into two groups: eukaryotes and prokaryotes. ![]() However, the level of organization varies within the cells of different organisms. Cells are also capable of self-replicating. Cells contain genetic material ( DNA and RNA), and they carry out essential functions, such as metabolism and protein synthesis. In some cases, a single cell constitutes an entire organism. All living organisms are built with one fundamental brick: the cell.
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