I got a C in A&P I the first time I took it at a CC Lets just say we started with 30 students in my class and ended up with 9! We all got C's! I got a B in A&P II at a University. Just this past fall, I took A&P I again at a CC and still got a B.
With all that being said, yes, it looks good if you have A's in A&P. However, if you make up for it with observation hours/work experience in PT it really pays off! My prerequisite GPA was around a 3.5 but I got into a program starting this fall due to my experience which really shined through in the interview.
Getting a B in A&P is not the end of the road! Keep working at it and if you have anymore questions just ask! Good luck!