1 month for bio + math + pat is plenty of time IMO.
If you do 1 math destroyer test every day from now till you take the test, you should be in great shape.... and when you finish all the tests in the book, go back over to test 1 and start the process again. Just keep doing the problems over and over until your test date.
As for PAT, I really think Crack DAT PAT is the best resource out there, design a plan that will get you to go over all 10 tests within the next month
As for biology, cliff's ap bio is awesome, I recommend reading it 2x times while having a biology text book near by as a reference guide
Good luck to ya