AS & A Level Biology (9700) — May–June 2025, Paper 53
2 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Question 1 · 13 marks · 17 Inherited change
Drosophila melanogaster (fruit flies) have many heritable characteristics, including eye colour. Eye colour in Drosophila is determined by two genes, A and B, which are on…
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The short-beaked echidna, Tachyglossus aculeatus, is a mammal that eats ants and termites. Echidnas produce a protein called EchAMP in their saliva. Scientists think EchAMP kills…
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