Why is it important for cells to undergo mitosis?

Mitosis is a crucial process for the growth and repair of body tissues, which makes it essential for maintaining healthy and functional organisms. During mitosis, a single cell divides to produce two genetically identical daughter cells, ensuring that when cells are needed for growth—such as during development, healing from injuries, or replacing old or damaged cells—the necessary number of cells is produced efficiently.

This process is vital in multicellular organisms, where a consistent supply of new cells is required to support ongoing physiological functions. For instance, when you get a cut, mitosis enables the rapid production of new skin cells to heal the wound. Without this mechanism, growth and healing would be severely compromised, leading to significant health issues.

In this context, while other options mention important aspects related to cellular functions, they do not capture the primary role of mitosis in facilitating growth and repair, which is why this answer stands out as the most relevant to understanding the significance of mitosis in living organisms.