I had both Kirss and Davies for chem, and potts-santone for biology.
Biology is a weed out class. The material isn't difficult but her exams are very detail oriented. Gen Bio I (pharm majors don't have to take bio II I thhhhink) is pretty basic... the concepts are easy (shocking: amino acids make up DNA, DNA makes up genes!) but you'll need to know the nit-picky details to do well on the exams. If you study it's not tough to get a good grade, but DO study because you're competing with neurotic freshman pre-meds.
Witten is supposed to be terrible, and I would avoid him. Kirss and Davies were both pretty easy... I preferred Kirss but only because Davies spends most of class telling stories. Cool old man and not a bad prof, but I felt like class was a waste because we only spend 1/2 the class actually learning chemistry.
There are a gazillion college writing professors, so I would be surprised if anyone is familiar with cook. As far as intro to college, the class is a total joke most of the time and the prof won't really make a difference.
Don't know Gruber, probably a newer professor, but intro to psych shouldn't be a problem regardless.