Elizabeth Jennings was able to rise against segregation in a time that no one else in the african community had thought about it. she made her satnd against segregation in buses, in a time that the memory of the civil war and abolishment of slaverly was still fresh.
Answer:
A randomized experimental study
Explanation:
The experimental study is an epidemiological, analytical, prospective trial, identified by the artificial modification of the study factor by the investigator and by the randomization of the cases or subjects into two groups, called "control group" and "experimental group".
Answer:
a. the sweetened water.
Explanation:
According to the principles of classical conditioning, conditioned stimulus occur when the intended stimulus create similar response in an experiment to that of the unconditioned stimulus. In other words, they are responses triggered when associated with unconditioned stimulus.
Here, the sweetened water is an intented stimulus. It was given to the rats with an immune-enhancing drug to boost their immune systems. However, when the drug was removed, the rats still showed signs of enhanced immune system just with the sweetened water. It shows that the sweetened water has associated with the unconditioned stimulus, which is enhanced immune system functioning, and now triggers the same response even without the drug.
