How hard is it to transfer into Human Bio?

<p>I got accepted via the waitlist prior to May 1st (Muir College, aww yeeeeuh)! Oddly enough, they didn't give me either of my majors - I'm accepted as undeclared. o_O<br>
However, I've also been accepted as a bio major at UCI in the honors program, so I'm trying to decide where to go. </p>

<p>I've always wanted to go to UCSD, but if it's really hard to switch into Human Bio, I think that the honors program at UCI will work better for me. Can anyone give me the laydown on the logistics of declaring a major?</p>