China, North Korea, South Korea
Answer:
An organ system is a group of organs that work together to perform a certain function in a body. The human body has 11 different organ systems, some of which are the cardiovascular, respiratory, muscular, and nervous systems. For example, the cardiovascular system consists of the heart, arteries, veins, and capillaries.
Not only organs that make up an organ system have to work together, but organ systems as well. Otherwise, our body wouldn't be able to work properly. For example, the respiratory system and the cardiovascular system cooperate to deliver oxygen to cells and expel the carbon dioxide, which is the product of the cells.
The correct answer is d. A conditioned response.
Ivan Pavlov was a Russian scientist interested in studying how digestion works in mammals. According to Pavlov, the dogs were demonstrating a conditioned response. He explained it like this: there's a neutral stimulus (the bell), which by itself will not produce a response, like salivation. There's also a non-neutral or unconditioned stimulus (the food), which will produce an unconditioned response (salivation).
Answer:
Fav is Ron and Hermione and Jacob Kowalski and Queenie Goldstein
Explanation:
Least fav Neville and Bellatrix ( Self-explained XD )
