JRMDR,
Why don't ppl take more sci classes to boost their sci GPA?
I think some ppl do. Classic example is taking credit for research hours. 3hrs or 6hrs of A. However, my school (and many others probably)don't give grades for research, only credit hrs.
I think the main reason ppl don't try to boost their sci GPA w more classes is once you've taken all your prereqs it's tough to find an easy science elective. I was a biochem major so there weren't many classes that I knew I could ace. Advanced inorganic? Mole bio? maybe. If you didn't get A's in the lower classes there's not much reason to think you can ace an advanced class. However, I did take cell bio (easiest sci elective) and I got an A, but in retrospect I should have taken micro or histo rather than take the easy A.
I think another reason is that ppl are equally concerned about their total GPA. Arguably more important. And it is much easier trying to boost your tGPA with psych or theater classes than more advanced science. Hope this helps.