Answer:
His ears popping
Explanation:
Conditioned response: In psychology, the term "conditioned response" is described as one of the different parts in the "classical conditioning theory" and is also written as "CR". The theory of classical conditioning was determined by a psychologist named Ivan Pavlov while he was conducting a small experiment in his laboratory on dogs.
A conditioned response is referred to as an organism's behavior that doesn't come out naturally yet it can be leaned by the organisms via the pairing of a "neutral stimulus" with a "potent stimulus" or "unconditioned stimulus".
In the question above, the given statement signifies conditioned response as "his ear-popping".
Atoms and molecules however atoms are smaller than molecules
Cells spend most of their lives in interphase, specifically in the S phase where genetic material must be copied. The cell grows and carries out biochemical functions, such as protein synthesis, in the G1 phase.