AQA A-Level Biology Paper 3 Predicted Paper 2023 QUESTIONS AND ANSWERS

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AQA A-Level Biology Paper 3 Predicted Paper 2023 Name …………………………………………………………………… Date ………………… 2 hours allowed. You may use ... a scientific calculator and a ruler with millimetre measurements. Answer all questions in section A. Answer one question from section B. Grade boundaries These are VERY rough guesses! Getting a B on this paper does not guarantee you the same mark in the exam. • A* 65% • A 55% • B 45% • C 40% • D 35% • E 30% SECTION A Answer all questions in this section. 01 The Hawaiian Islands have the most diverse collection of Drosophilid flies in the world with approximately 800 different species having been identified. All of the species have been traced back to a single common ancestor from mainland USA that colonised the islands millions of years ago. It is hypothesised that this could have been a single fertilised female blown across in a storm or trapped in a piece of fruit stuck to a bird. a) What is a gene pool? [1 mark] b) Explain how the Hawaiian species of flies could have evolved. [6 marks] [Show More]

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