What does apoptosis contribute to in multicellular organisms?

Apoptosis, or programmed cell death, plays a crucial role in the growth and development of multicellular organisms. This process is essential for maintaining homeostasis within tissues by eliminating cells that are no longer needed, such as those that are damaged, dysfunctional, or in excess. During development, apoptosis helps shape organs and structures, such as the removal of webbing between fingers and toes in a developing embryo.

By regulating the number of cells and ensuring that only healthy, functioning cells remain, apoptosis contributes to proper tissue formation and overall organismal health. This process is fundamental for maintaining the balance between cell proliferation and cell death, which is necessary for growth, development, and tissue remodeling throughout an organism's life.