Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
BIOLOGY
Paper 1
Monday 11 May 2025 Morning Time allowed: 1 hour 30 minutes
Materials For Examiner’s Use
For this paper you must have: Question Mark
• a ruler with millimetre measurements
• a scientific calculator. 1
2
Instructions 3
• Use black ink or black ball-point pen.
4
• Fill in the boxes at the top of this page.
• Answer all questions. 5
• You must answer the questions in the spaces provided. Do not write 6
outside the box around each page or on blank pages. 7
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). 8
• Show all your working. 9
• Do all rough work in this book. Cross through any work you do not want
TOTAL
to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 75.
7 401 /1
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IB/M/Jun25/G4002/V5
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 Observable characteristics can be used to compare genetic diversity between box
species.
Give two other ways in which genetic diversity between species can be compared.
[2 marks]
1
2
0 1 . 2 A student compares the mean surface area of leaves on the ground from two
populations of wild cherry trees.
Describe and explain how the student should collect these leaves to obtain valid data.
[2 marks]
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, 3
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outside the
0 1 . 3 Another student investigated the variation in leaf length using the ruler shown in box
Figure 6.
Figure 6
The student measured the length of one leaf as 86 mm
State the uncertainty of this measurement and use this to calculate the percentage
uncertainty in the length measurement.
[2 marks]
Uncertainty mm
Percentage uncertainty 6
Turn over for the next question
acids
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, 4
Do not write
outside the
Turn over for the next question box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
Turn over ►
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IB/M/Jun25/7401/1
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
BIOLOGY
Paper 1
Monday 11 May 2025 Morning Time allowed: 1 hour 30 minutes
Materials For Examiner’s Use
For this paper you must have: Question Mark
• a ruler with millimetre measurements
• a scientific calculator. 1
2
Instructions 3
• Use black ink or black ball-point pen.
4
• Fill in the boxes at the top of this page.
• Answer all questions. 5
• You must answer the questions in the spaces provided. Do not write 6
outside the box around each page or on blank pages. 7
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). 8
• Show all your working. 9
• Do all rough work in this book. Cross through any work you do not want
TOTAL
to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 75.
7 401 /1
tyrionpapers.com for m o r e resources
IB/M/Jun25/G4002/V5
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 Observable characteristics can be used to compare genetic diversity between box
species.
Give two other ways in which genetic diversity between species can be compared.
[2 marks]
1
2
0 1 . 2 A student compares the mean surface area of leaves on the ground from two
populations of wild cherry trees.
Describe and explain how the student should collect these leaves to obtain valid data.
[2 marks]
tyrionpapers.com for more resources
IB/M/Jun25/7401/1
, 3
Do not write
outside the
0 1 . 3 Another student investigated the variation in leaf length using the ruler shown in box
Figure 6.
Figure 6
The student measured the length of one leaf as 86 mm
State the uncertainty of this measurement and use this to calculate the percentage
uncertainty in the length measurement.
[2 marks]
Uncertainty mm
Percentage uncertainty 6
Turn over for the next question
acids
tyrionpapers.com for more resources
IB/M/Jun25/7401/1
, 4
Do not write
outside the
Turn over for the next question box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
Turn over ►
tyrionpapers.com for more resources
IB/M/Jun25/7401/1
