The learned response to a conditioned stimulus is: D. CR.
<h3>What is
classical conditioning?</h3>
Classical conditioning can be defined as a learning process which typically involves repeatedly pairing two stimuli, which include the following:
In classical conditioning, a response which is at first brought forth by the second stimulus would later be brought forth by the first stimulus alone.
This ultimately implies that, classical conditioning is a process through which a living organism can learn how to associate stimuli and as a result anticipating events.
In this context, we can infer and logically deuce that the learned response to a conditioned stimulus is conditioned response (CR).
Read more on conditioned response here: brainly.com/question/24868138
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Explanation:(a) Was this an observational study or an experiment? Explain your reasoning. Experiment, because certain variables were controlled (he sets the screen brightness to low and then starts a movie) to determine if iPhones last longer if the screen brightness is set to low, and it proves the cause and effect relationship.
(b) What is the explanatory variable and the response variable? Response Variable- To determine if iPhones last longer if the screen brightness is set to low Explanatory variable- he sets the screen brightness of 10 of the iPhones to high and starts a movie, then the other 10 to low and starts a movie.
(c) Was a random sample used to collect the data? Yes- “he selects a random sample of 20 brand new iPhones”
Answer:
The crusades created standardized methods of taxation and increased European trade.
Answer: Electron
Explanation:
Two type of microscopes that are used to view cells are optical and the electron microscopes.
The optical microscope, is also called the light microscope, and it uses visible light and lenses to magnify small objects and make them bigger. It is used in viewing cells as they appear big.
Electron microscope gives a high resolution images of specimens. The electron microscope is used in medicine to investigate tissues, cells, etc.
