<p>i noticed that for bio, the 8 series is required in lower division...what if i wanted to take the 7a-c series b/c im not sure if i want either bio or physics?</p>
<p>then take 7 series because, if you do, then you could major in bio or physics.
Whereas, if you take the 8 series, then you can only major in bio.</p>
<p>The 7 series is harder and is intended for physics and engineering majors.</p>