nothings impossible, last semster i took, calc 2, immunology, molecular biology, biology of cancer, antamomy physiology, and histology. Ended up with a 4.0, but keep in mind i didn't leave my room
that depends...did you recently have the chryogenically frozen brain of einstein implanted into your head?
It's not impossible, but it probably wouldn't be easy...probably be even harder if you had to work and go to school. And it would probablybe even harder if you wanted to have anything that resembled a personal life during that semester. But if you like staying in the library all day, then go for it. If you pull it off, the Admissions people will probably rave that you could handle such a tough load.
It depends on the professors teaching the classes and on your willingness to spend lots of time studying. What university are you at? I would suggest using one of the professor rating websites or talking to people who have taken the classes at your school to determine if the workload is doable. Remember, you don't have that much time left to enjoy yourself in college, so it might be a good idea to take it easy until dental school if at all possible. Personally, I'll be taking psychology and basket weaving during my last semester.
If you have a strong bio background... keep everything but Biochemistry. You will be able to handle the others together.
If you are better in chemistry, then take Biochem and Physiology together with the lab. Leave ecology and Molecular Bio out.
If you only want to drop one, choose between Biochem and Physiology (because those 2 classes with all the others you listed is WAAAAAAAY too much of an overload.)
But on the other hand, most schools suggest taking Biochem and Physiology at the same time because a lot of the concepts parallel each other.
I have taken all of the classes you listed (minus parasitology lab) and can not imagine how poorly I would have done if I took them all together!
I am not the type to say "never"... but in this instance, getting A's in all 5 of those classes the SAME semester, is never going to happen.