Jean and Jane are identical twins who live in the same household and are in two different second grade classrooms. When looking at variations in Jean and Jane’s development researchers might consider the influence of their family, known as their environment and their classrooms which is known as their environment.

shared; non-shared                        

Explanation:

In the question above, Jean and Jane are identical twins so their family would be considered as the shared environment and since they were in different grade classrooms their environmental influence would be considered as non-shared.

According to the development researcher, in the given context the influence of the family of Jean and Jane are considered as "shared environment" because of both of getting the same environment to grow and nourish apart from the fact that they both share the same genetic material as they are twins. Therefore, classrooms environment are considered as "non-shared" as they both are in a different environment and will learn things differently based on the specific environment from which they belong.

The research on nature versus nurture describes that an individual's intelligence depends on both i.e, the family influence and the environmental factors.

i think the answer is true

according to classical republican political theory, which democratic republics would function best?

a.   small republics, with people who had similar interests

b.   large republics, with people who had competing interests

c.   republics made up entirely of landowners

d.   republics made up entirely of servants