What is the unique ability of plant cells to divide, grow, and differentiate into new cells with the same genetic identity?

The correct choice highlights the concept of totipotency, which refers to the unique ability of plant cells to divide, grow, and differentiate into entirely new cells that retain the same genetic identity as the original cell. This characteristic is particularly significant in plants, as it allows a single cell, such as a zygote or somatic cell, to develop into a complete organism, including the ability to form all types of tissues and organs. This trait is foundational to processes such as vegetative propagation, tissue culture, and cloning in plants, facilitating the regeneration of entire plants from single cells.

In contrast, other options like multipotency and pluripotency describe different capabilities of cell differentiation. Multipotent cells can develop into multiple cell types, but not all cell types, while pluripotent cells can give rise to nearly all cell types but typically do not retain the capability to form an entire organism. Stem cell differentiation refers to the process by which stem cells develop into specialized cells, but it does not specifically capture the concept of a single cell's ability to form a whole organism with genetic identity. Thus, the focus on totipotency accurately encapsulates the remarkable regenerative abilities of plant cells.