I would highly recommend getting her papers back to see where she went wrong. This is best done ASAP as there is a small window on getting them re-marked. Was the Biology one AQA? There's been some very odd results for the Unit 1 exam.
DD got EEC today, she is really upset as she got E in Biology and we had a tutor and had a really bad Christmas as she put so much into her revision, she can't resit them as I am sure she would never cope with the workload, she's struggling now.
She intends to talk to each of her teachers then the head of year to see what her options are.
Feel gutted for her, she has never had a E in her life.