Can someone answer this for me ? !

The solvent and the solute: when two parts combine to make a solution, the properties of the solution differ from the properties of the individual parts.

The two parts are a solvent and solute which makes a solution

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later