A physical change does not involve a change in the substance’s chemical identity. Which of these statements describes a physical change? Group of answer choices

A banana starts to smell as it ripens.

Onions taste sweeter after being cooked.

Aluminum cans get crushed before recycling.

Copper turns green when exposed to air.

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