Biology revision help? Urgent!?

Kellie

New member
Hi.
I really need to answer these two questions for my Biology revision. But I can't find anything about them! Could someone please help me out? I'm not cheating on anything by the way, because it's not exactly homework. I just need to know, cause my exams on Wednesday next week., and I want to do well, and this will come up!
Also, I need one more question answered, if that's okay.
How do nicotine patches help smokers stop smoking?
I know it's a really stupid question, and I do know it, but I can't remember exactly how to word it!

Any help would be very much appreciated.

Thanks! :)
 
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