Fresh off the official markscheme... My teacher marks them: The whole markscheme is ridiculously harsh, to get marks you need to mention specific words in every answer and you cannot have the vague responses.
The ATP question only has two answers and you can't have it releases a small energy quickly or that it is easy.
The Selection answer was Directional.
Feather mites analysis question about the table you had to talk about the specific rows and not what the results showed overall.
The cat alelle question is straightforward... if you got it right you got it right there were no difficulties in it.
The Carbon cycle question you have to specifically refer to tree's use as a carbon sink and absorbing co2 through photosynthesis and removing the trees prevents them from doing this... You were not allowed to be vague.
Nitrogen cycle one: Marks for: Ammonification, Saprobates, Nirtifying bacteria, Nitrogen fixation, Ammonia- Nitrites- Nitrates.