Final answer:
The experiment with a mouse cell and human cells demonstrates the Cell fusion ability, which is different from cell differentiation, interspecies communication, and the process of forming hybrid cells. The correct option is A.
Step-by-step explanation:
The experiment of putting a mouse cell and human cells together primarily demonstrates Cell fusion ability. This experiment is a part of research in cellular biology where the focus is on understanding how cells from different species can be fused together to form a single cell.
This process does not necessarily relate to cell differentiation, which is the process by which a cell changes from one cell type to another. It also does not necessarily concern interspecies communication, which involves signaling between different species, nor the inability to form hybrid cells as the experiment's goal is to achieve cell fusion.
Cell communication can occur directly through contact between cells or from a distance via chemical signaling. This is a versatile mechanism by which cells interact and is key to numerous cellular processes, but it is not the main focus of the experiment described. Therefore, the correct answer is A: Cell fusion ability.