Which of the following statements BEST describes a compound?
(10 Points)
A. A compound is composed of atoms from two or more different kinds of elements that are chemically combined.
B. A compound is a molecule composed of two or more atoms from the same element that are chemically combined.
C. A compound is a pure substance composed of one atom from one type of element.
D. A compound is an atom composed of two or more molecules from only one element.

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