It allowed the South to make their own rules and just reinforced the fact that slavery was not allowed in the North
The earliest introduction of zebra mussels in united states probably occurs in 1986.
At that time, commercial vessels from Europe went to north America as a place for freshwater ballast stowaway. They merchants then introduced zebra mussels to the market and it gained popularity ever since. They also introduced zebra mussels population in local lakes and let them reproduce there.
Learning to
solve puzzles can be considered an example of the cognitive dimension of
development. Cognitive development<span> is defined as the a field of study in </span>neuroscience and psychology<span> concentrating on
a child's development in terms of information processing, conceptual resources,
perceptual skill, language learning, and other phase of brain development and </span>cognitive
psychology compared to an adult's point of view. Therefore, cognitive
development is the emergence of the ability to think and understand.[
<span> </span>
The industrial technology, explosive growth of cities, and new
political change were the three basic societal changes that sparked the
sociological perspective.
To add, <span>the sociological
perspective is a view on human behavior and its association to society as a
whole. It asks us to look for the associations among the behavior of
individual people and the structures of the society in which they live.</span>
Answer:
The answer is- No control Group
Explanation:
The researchers want to use 120 rural schools, however this will not work out because there are no control groups in the experiment.
A control group is the group that does not receive the offer. In this scenario, all the 120 rural schools receive the offer. The control group will help measure the attendance of teachers this school year which were not offered better pay. This will be used to determine how much the offer increased the attendance or the impact of the better pay on the attendance 0f teachers.
It will also not be good to compare this year's attendance to that of last year because the condition this year might be different when compared to last year, for instance, if this year is unusually cold compared to last year and some of the teachers caught cold and could not attend some of their classes then it is expected that there will be lower attendance when compared to last year and the better payment would not be the cause of change in attendance.