Which region of the root tip is primarily responsible for cell division?

The region of the root tip that is primarily responsible for cell division is indeed the region of cell division. This area contains the apical meristem, which consists of actively dividing cells that contribute to root growth. As these cells undergo mitosis, they produce new cells that will later differentiate into various root tissues and contribute to the overall structure and function of the root. This continuous division is crucial for the root's ability to extend into the soil and absorb water and nutrients.

In contrast, the region of elongation is where newly formed cells increase in size, contributing to the overall length of the root. The region of maturation, on the other hand, is where cells differentiate into specific types (like vascular, epidermal, and ground tissue) and is responsible for the root's functionality. Lastly, the region of protection typically refers to the root cap, which protects the growing tip of the root as it penetrates the soil but does not engage in cell division.