If you are a good student Bio 189 should not be a problem. you must study 2 hours for every hour of instruction.
You will prob not get in fall 09 unless you get really lucky on August 10 when others have been purged from the system for non-payment.
Also, you must register for your lab prior to registering for your lecture. The system will not allow you to register the other way around. It is that way for ALL biology classes!
As for taking the classes at the same time, of course you can! After Bio 189; you take A & P 223 lab and lecture; then by all means you should take a&p 224 and micro 251 at the same time. Many students just take those two classes.
Do you have kids? How much are you going to work? How many commitments do you have? You can do ANYTHING you set your mind to do! This is what I did:
Summer 08-- Hist 101, Bio 189, Math 100B
Fall 08-- Hist 102, A&P 223, Soc 101, Psy 101, and FF101
Spring 09-- A&P 224, Micro 251, Eng 100, ACLS Instructor
Everyone has their own thing going on, their own time line. It is VIP to stick with your own ability and need to grow.
Just remember to take the TEAS test early, so as not to be under pressure. It is good for 5 years but can only be repeated every 6 months. so if you plan to apply to nursing school
in the fall 2010-- the dead line for it is generally around March 1st of that year; so take the teas test at least one year before the deadline in case you need a 2nd try.
I hope this is enough info for you.