AQA A-Level Biology Paper 3 Predicted Paper, 2023 attached with marking scheme

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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.


Possible Marks
Question
marks gained
Grade boundaries 1 11
2 8
These are VERY rough guesses! Getting a 3 9
B on this paper does not guarantee you 4 9
the same mark in the exam. 5 16
SECTION B 25
Total 78
 A* 65%
 A 55%
 B 45%
 C 40%
 D 35%
 E 30%




1

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2

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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]




3