Answer:
Population, agriculture, cities
Explanation:
The American Indian groups or Native Americans had no idea of money and no economies, not until the European immigrants introduced it to them. Even though a lot of time has passed when they were introduced to the ideas of economy and money, a lot of them declined the use of money as they believed that money is evil in nature.
The answer should be eukaryotic cells, because they have membrane bound cells, and are larger than prokaryotic cells.
Though, all cells are living.
Answer: CS(Conditioned Stimulus )
Explanation:
Conditioned stimulus is the factor that was at neutral state at previous time but after getting connected with unconditioned stimulus it produces a trigger in the form of conditioned response.
According to the question, door closing is conditioned stimulus because door gets combined with the closing action done by Dr. Meyer which generates a trigger that indicates students about pop quiz.