The state of maintaining a stable internal environment regardless of changing external conditions is called
.

There should not be any changes in the gene pool.
In Hardy-Weinberg equilibrium, the gene pool should have a constant rate. The equilibrium can be achieved if there is no factor that favors one gene more than the others. Since the genes have the equal chance to survive and mating, the ratio of the gene pool should not change dramatically.
Answer:
Start from the bottom and go up.
I am not sure if its going to be right or wrong but I would pick either C or A
Answer:
100% Heterozygous Dominant (Rr)
Hope this helps!