For example, the cells in your eye share have same dna as the ones in your muscles, but they serve very different functions. Organ systems only develop in larger, complex organisms Organisms such as bacteria and protists are unicellular and do not have specialized organs like animals and plants
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These unicellular organisms perform all necessary functions within a single cell.
They have a complex internal structure with a central capsule containing a nucleus and various organelles.
Specialized regions in multicellular protists do not have the same level of structural complexity and integrated function as tissues and organs in organisms with more advanced levels of organization. No, because if you have a single celled organism, you don't have enough cells to make a tissue, so you won't have enough tissue to make organs, and you won't have any organs to create an organ system. The purpose of mitosis is to have a cell division which allows the cell to reproduce During mitosis the cell is divided into separate organisms
Single celled organisms are no longer single.