Molecules are the smallest units of matter with the characteristic properties of a substance. a. true b. false

False, Atoms are the smallest units of matter that display both the chemical and physical properties of it, based on the structure of the atom.

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