Your teacher may be looking for something more specific than this. But, now the idea of evolution is generally accepted and now with modern technology we can mostly prove his theory. (it isnt proven as it is a theory).
The answer to your question is,
A prime meridian is a meridian in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its antimeridian form a great circle. This great circle divides the sphere, e.g., Earth, into two hemispheres.
-Mabel <3
Answer:
I'm pretty sure the answer is... It is the role of the courts to interpret and apply the law, and the Constitution is the highest law. This all ties back to judicial review where the courts can label something unconstitutional also ties back to checks and balances where each branch has a specific power and job.