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Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signat ure
I declare this is my own work.
A-level
BIOLOGY
Paper 2
Thursday 11 June 2020 Morning Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
• a ruler with millimetre measurements Question Mark
• a scientific calculator. 1
2
Instructions
3
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. 4
• 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.
• If you need extra space for your answer(s), use the lined pages at the end of 7
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
10
to be marked.
TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 91.
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2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 The iris in the human eye is a muscular structure. The iris changes the size of the
pupil.
Figure 1 shows the muscles in the iris.
Figure 1
0 1 . 1 Suggest and explain how the interaction between the muscles labelled in Figure 1
could cause the pupil to constrict (narrow).
[2 marks]
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3
Do not write
outside the
0 1 . 2 box
The fovea of the eye of an eagle has a high density of cones. An eagle focuses the
image of its prey onto the fovea.
Explain how the fovea enables an eagle to see its prey in detail.
Do not refer to colour vision in your answer.
[3 marks]
0 1 . 3 The retina of the human eye has an area of approximately 1.094 × 103 mm2
The circular fovea in a human eye has a diameter of 3 × 103 µm
Calculate the area of the fovea as a percentage of the area of the retina.
The area of a circle is πr2. Use π = 3.14 in your calculation.
Show your working.
[2 marks]
Answer %
Question 1 continues on the next page
Turn over ►
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Your text here 1
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signat ure
I declare this is my own work.
A-level
BIOLOGY
Paper 2
Thursday 11 June 2020 Morning Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
• a ruler with millimetre measurements Question Mark
• a scientific calculator. 1
2
Instructions
3
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. 4
• 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.
• If you need extra space for your answer(s), use the lined pages at the end of 7
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
10
to be marked.
TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 91.
*JUN207402201*
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IB/M/Jun20/E14
Distribution of this document is illegal
7402/2
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2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 The iris in the human eye is a muscular structure. The iris changes the size of the
pupil.
Figure 1 shows the muscles in the iris.
Figure 1
0 1 . 1 Suggest and explain how the interaction between the muscles labelled in Figure 1
could cause the pupil to constrict (narrow).
[2 marks]
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, Stuvia.co.uk - The Marketplace for Revision Notes & Study Guides
3
Do not write
outside the
0 1 . 2 box
The fovea of the eye of an eagle has a high density of cones. An eagle focuses the
image of its prey onto the fovea.
Explain how the fovea enables an eagle to see its prey in detail.
Do not refer to colour vision in your answer.
[3 marks]
0 1 . 3 The retina of the human eye has an area of approximately 1.094 × 103 mm2
The circular fovea in a human eye has a diameter of 3 × 103 µm
Calculate the area of the fovea as a percentage of the area of the retina.
The area of a circle is πr2. Use π = 3.14 in your calculation.
Show your working.
[2 marks]
Answer %
Question 1 continues on the next page
Turn over ►
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