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.
It depends what book you are talking about or how your perspective of the character is. In my opinion I would be friends with the main character because they have a brave spirit and seem to be outgoing and fun yet loyal.
Answer:
Please give more information!!
Explanation:
In order to study personality development, a researcher studies the same individuals at 7, 14, 21, and 28 years of age. In this case, the researcher is using the <u>longitudinal </u>method.
In a longitudinal study, researchers repeatedly take a look at the identical individuals to come across any changes that would occur over a time frame. Longitudinal research are a form of correlational research in which researchers take a look at and acquire statistics on some of variables with out attempting to persuade those variables.
A longitudinal take a look at, like a cross-sectional one, is observational. So, once again, researchers do no longer interfere with their topics. however, in a longitudinal study, researchers conduct numerous observations of the equal topics over a period of time, on occasion lasting a few years.
The longitudinal procedure is one wherein no unique fashion over time is anticipated; the interest is in assessing how an awful lot responses range through the years for a standard man or woman. Observations range up and down over time for each man or woman and it's far the quantity of fluctuation that is the point of interest of the study.
Learn more about longitudinal here: brainly.com/question/15531840
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