Here's a breakdown of why this is essential:

* Genetic Continuity: DNA contains the instructions for building and maintaining an organism. Without a complete copy of this information, a new cell would be unable to function properly.

* Preservation of Traits: Replication ensures that the genetic information passed down from one generation to the next remains largely consistent. This is fundamental for maintaining the characteristics of a species.

* Error Prevention: While DNA replication is incredibly precise, errors can occur. However, the process includes mechanisms to correct these errors, minimizing mutations and potential harm to the daughter cells.

* Cellular Growth and Development: Cell division is essential for growth, repair, and development in multicellular organisms. Without accurate DNA replication, these processes would be compromised, leading to abnormalities and disease.

In summary, DNA replication is a critical step before cell division because it guarantees that each new cell inherits a complete and accurate set of genetic instructions, ensuring proper function, maintaining genetic integrity, and supporting healthy growth and development.