bio is usually a prereq for A&P, so if you get through A&P bio should be cake.
I loved A&P, but I worked my butt off. I probably could have gotten a decent grade by doing less work, but I knew I'd need to know it anyway in the future, so I devoted a lot of extra time to really learning the material so I would know it, not just be able to spit it off on a test and then forget it.
Physics I and Chem I were easy. Chem II was hard conceptually, but I got an A because my prof was cool. I got a 52% on the midterm. hahah. The labs saved me, and quiz corrections.
Physics II is tearing me a new one right now. I hate it. I really don't see the connection to PT. It's interesting, I guess, when you learn about relativity and some of the mind-blowing stuff, but electrical circuits and magnetic forces did nothing for me. Lots of equations and math in that class.
All the psych courses were super easy, but it was my minor so maybe that's why.
If you're starting from scratch, my suggestion is this: try to take Physics I/II, Chem I/II, etc., in order....I took physics I in spring of 2009 and am taking physics II currently....having 2 semesters off (summer and fall) between the sequence may have hurt me a little. If you can take them sequentially I'd recommend it....especially in physics and A&P when a lot of things build off of what you learned before. Chem didn't seem to have as much carry over between the two, and I took two totally random bio classes for that requirement (intro and micro), so the order of those didn't matter.
Good luck!