Whats the purpose of mitosis in multicellular and single-celled organisms?
You have this question because multicellular organisms have mitosis for different reasons than the single-celled organisms do. Multicellular organisms have cell division with mitosis in order to make new body cells for growth, development, repair of damaged tissue, and replacement of worn-out cells, as well as asexual reproduction in some of them. Unicellular or single-celled organisms have cell division with mitosis in order to reproduce. After the division there are two separate organisms.