Gas Exchange: AQA A Level Biology Exam Questions by Topic
Eighteen real AQA exam questions on gas exchange, from tracheoles, gill lamellae and leaves to alveoli, breathing and lung disease data, each with its mark scheme and advice from the examiners' reports.
Surface Area to Volume Ratio: AQA A Level Biology Exam Questions by Topic
Fourteen real AQA exam questions on surface area to volume ratio, from size, diffusion and body shape to metabolic rate and ratio calculations, each with its mark scheme and advice from the examiners' reports.