Answer:
The Tuskegee Airmen were the first black military aviators in the U.S. Army Air Corps a precursor of the U.S. Air Force. Trained at the Tuskegee Army Air Field in Alabama, they flew more than 15,000 individual sorties in Europe and North Africa during World War II.
Answer:
neutral; response-producing
Explanation:
The experiments by Pavlov demonstrated how a "neutral" or also called unconditioned stimulus, was paired with a "response-producing" or conditioned response. This means that an association created between them would enable dogs to learn something unknown and new to them.
When dogs listened to a sound (a bell ringing), they learned that food was approaching to they began to salivate, for they would receive food shortly after.
After some time, dogs kept listening to a bell, but the food was no longer provided, and still, they kept salivating as if the food was there.
Therefore, they had already had a conditioned response!
Answer:
The Columbia Exchange is also known as the Great Exchange occurred in the middle of 1940's.
Explanation:
The Great Exchange is an exchange of cultures and livelihood of between Eastern and Western Hemisphere, in the areas of politics, economics, and social back ground.
The great exchange was caused by a strong desire for continents such as Europe, America, Africa and Asia, to participate in joint trading activities, which affected every strata (politics, economics , religion ) of the people and culture.
Crops such as Beans, were exported from America to Europe, Africa and Asia, and eventually grown in the continents they were imported to. As a result, they were issues of epidemics following the trade exchange, but such epidemics were managed eventually.
