AQA A-Level
BIOLOGY
PAPER 3
QUESTION
PAPER 2020
, Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level BIOLOGY
Paper 3
Monday 15 June 2020 Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
• a ruler with millimetre measurements • a scientific calculator.
Question Mark
Instructions
1
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. 2
• Answer all questions in Section A.
• Answer one question from Section B. 3
• You must answer the questions in the spaces provided. Do not write outside the 4
box around each page or on blank pages.
• If you need extra space for your answer(s), use the lined pages at the end of this 5
book. Write the question number against your answer(s).
• Show all your working. 6
7
TOTAL
• Do all rough work in this book. Cross through any work you do not want to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 78.
,*JUN207402301*
IB/M/Jun20/E14 7402/3
Section A
Answer all questions in this section.
You are advised to spend no more than 1 hour and 15 minutes on this section.
0 1 Guppies are small fish. Female guppies are dull in colour. Male guppies can be bright
or dull in colour.
Scientists investigated the effect of female brain size on choosing a mate. They used
laboratory-bred female guppies with large brains and with small brains.
They set up a fish tank as shown in Figure 1.
Figure 1
They observed each female for 10 minutes and recorded which male
they were attracted towards. They repeated this with 45 large-brained females
and 45 small-brained females.
0 1 .1 Suggest three possible limitations of this investigation.
[3 marks]
1
2
3
, 2
D
o
no
t
wr
ite
ou
tsi
de
th
e
bo
x
02
*
* IB/M/Jun20/7402/3
BIOLOGY
PAPER 3
QUESTION
PAPER 2020
, Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level BIOLOGY
Paper 3
Monday 15 June 2020 Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
• a ruler with millimetre measurements • a scientific calculator.
Question Mark
Instructions
1
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. 2
• Answer all questions in Section A.
• Answer one question from Section B. 3
• You must answer the questions in the spaces provided. Do not write outside the 4
box around each page or on blank pages.
• If you need extra space for your answer(s), use the lined pages at the end of this 5
book. Write the question number against your answer(s).
• Show all your working. 6
7
TOTAL
• Do all rough work in this book. Cross through any work you do not want to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 78.
,*JUN207402301*
IB/M/Jun20/E14 7402/3
Section A
Answer all questions in this section.
You are advised to spend no more than 1 hour and 15 minutes on this section.
0 1 Guppies are small fish. Female guppies are dull in colour. Male guppies can be bright
or dull in colour.
Scientists investigated the effect of female brain size on choosing a mate. They used
laboratory-bred female guppies with large brains and with small brains.
They set up a fish tank as shown in Figure 1.
Figure 1
They observed each female for 10 minutes and recorded which male
they were attracted towards. They repeated this with 45 large-brained females
and 45 small-brained females.
0 1 .1 Suggest three possible limitations of this investigation.
[3 marks]
1
2
3
, 2
D
o
no
t
wr
ite
ou
tsi
de
th
e
bo
x
02
*
* IB/M/Jun20/7402/3
