Answer:
More than 350,000 African Americans served in segregated units during World War I, mostly as support troops. Several units saw action alongside French soldiers fighting against the Germans, and 171 African Americans were awarded the French Legion of Honor.
Explanation:
Answer: In modern view, the origin of variation is mutation. Since Darwin stated that variation will occurs in the most useful part and is retained, most people don't use their left hands, if according to Darwin's theory, those left hands should be going to extinct by now.
If Darwin's theory of variation is acceptable, then dwarfs who always want to be giant, by stretching the body, would have become giant by now.
Darwin just had a general idea about variation, offsprings tends to change in appearance from the parents. But this variation is not in terms of usefulness of the body parts of the parents, it is in terms of Gene mutation of the parents in their offspring.
Explanation: Darwin's 1859 theory set out a theory of Evolution by natural selection to explain adaptation and speciation.
According to Darwin's theory, individual of one generation are qualitatively different from one another this is as a result of natural selection. But in modern science, this is as a result of Gene mutation.
A student studied hard to get a good grade. It worked. the good grade is an example of positive reinforcement.
<h3 /><h3>What is positive reinforcement?</h3>
It refers to a psychological theory about the introduction of certain behaviors that will generate positive stimuli in the individual, which causes the repetition of this behavior to obtain a positive consequence, making the behavior conditioned and more likely to be repeated.
In the question above, we see that the student's behavior was related to studying hard to get a good grade, and the stimulus was the fact that he actually reached the desired grade.
Therefore, positive reinforcement can be used as a behavior conditioning strategy that will generate a favorable stimulus to the individual, being a potential motivator of behavior.
Find out more information about positive reinforcement here:
brainly.com/question/8517742
#SPJ1
