Last year:
for bio there was one on comparisons of lungs of people which smoke and dont smoke, food tests. There was also one on finding the number of plants in an area using sampling, had to work out area of a compound shape for it. There was also one on eutrophication.
and for chem there was one on comparisons on life cycle assesment comparisons.
Can't remember much more.
I did my triple higher gcse papers last year and got 9 and 8 in bio and chem