Igcse edexcel biologyWatch
Eutrophication and CORMS are old favourites, but they may mix things up to mess with us...
6 mark - Investigation question. Cormmss is fun.
5 mark - Application of knowledge of natural selection. Less fun.
5 mark - Description/explanation of the reflex arc. Pretty simple.
I'm not usually one to 'track' questions like this for the sciences - not reliable enough, really. I do hope there's going to be an investigation question or two, though. They're usually easy to do even if you don't know any biology.