i have been accepted to ucsd ucsb (in honors program) usd (in honors program) and davis. i was waitlisted into ucla.): my major is biology, so heavily impacted. do i have any chance for USC or UCB?
Of course you have a chance at UCB and USC. All college decisions are independent of each other. Good Luck.
Yes, you do.
If you have a look at the Discussions thread of UCLA, you will see that lots of highly qualified applicants have been waitlisted by UCLA this year. Also, several applicants were rejected by UCLA and accepted by UCB in the past few years.
It is clear from your other acceptances that your applicant is NOT weak in any respect and hence your waitlist from UCLA is absolutely NO indication of your future results.