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AQA 2012 biology exam + chemistry

Does anyone know about the fish question as to why their mouths are that shape? I wrote for mating call purpose etc... although ive heard others say its for hunting or something due to being different species and the need to adapt to something etc...

Also i accidently mucked up on the genes questions - its XX female and XY male - in the question it doesnt explicitly mention X chromosome being sexually linked thats why i did it both XX,

As for chemistry any answers for the first question of the table?

As for the last question in the biology exam you need to write about NADP, what rate process is faster, what respires and conversion of GP to TP - at least thats what i wrote.

Anyone find anything difficult - feel worried. please post ..