Final answer:
Cell division, also known as mitosis, is the process in which the cell's nucleus duplicates itself and the cell divides. This process is essential for growth, development, and repair in multicellular organisms.
Step-by-step explanation:
The process you are referring to is known as cell division or mitosis. During mitosis, the cell's nucleus duplicates itself, resulting in two identical copies of the cell's chromosomes. After the nucleus divides, the cytoplasm also divides, resulting in two genetically identical daughter cells.
This process is essential for growth, development, and repair in multicellular organisms. It allows for the production of new cells that can perform specific functions and replace old or damaged cells.