Answer:
B. Is what the scientists manipulate in the experiment.
Explanation:
The Independent variable is not dependent, or doesn't rely, on another variable in the experiment. So, it would make the most sense that they would manipulate the Independent so that they can watch and see how the dependent variable reacts to the manipulation, or the change, in the independent variable.
B, Sn it’s a metal as it’s a solid, malleable, shiny and a heat conductor
Answer:
conditioned stimulus
Explanation:
In Pavlov’s classical conditioning experiment with dogs, he used a bell (neural stimulus) which initially did not generate salivation until after pairing it with the meat powder (unconditioned stimulus). The meat powder (unconditioned stimulus) naturally triggers salivation (unconditioned response). After the association of the bell with the meat powder, salivation as a conditioned response became triggered by the tone of the bell alone.
The tone of the bell, which was originally irrelevant, is now the conditioned stimulus that now triggers salivation (conditioned response).
Answer:
They have a closed circulatory system.
Explanation:
In an open circulatory system, blood vessels transport all fluids into a cavity. When the animal moves, the blood inside the cavity moves freely around the body in all directions.
Closed circulatory systems are different to open circulatory systems because blood never leaves the blood vessels. Instead, it is transferred from one blood vessel to another continuously without entering a cavity.