Disclaimer: This document was created by department heads with many years of experience teaching the
AQA A Level Biology course. We cannot however guarantee that it is an accurate representation of the
Summer 2025 examinations and students should not treat it as such. Please use this as an aid, alongside other
methods of revision.
AQA A Level
Friday 13 June 2025
Morning (Time: 2 hours)
Biology
Unit: 7402/2
Paper 2
You must have:
Calculator, ruler
Instructions
• Use black ink or a ball-point pen.
• Answer all questions.
• Answer the questions in the spaces provided.
○ There may be more space than you need.
• Show all the steps in any calculations and state the units.
Information
• The total mark for this paper is 91.
• The marks for each question are shown in brackets.
○ Use this as a guide as to how much time to spend on each question.
Advice
• Read each question carefully before you start to answer it.
• Write your answers neatly and in good English.
• Try to answer every question.
• Check your answers if you have time at the end.
Turn over →
© 2025 Empirical Tuition. All rights reserved.
, Answer all questions.
1. Humboldt penguins are a species of penguin that inhabit the coastal areas of Chile. Due to their
declining population numbers, conservation biologists have implemented a mark-release-recapture
program to assess the effectiveness of conservation efforts.
(a) Define what is meant by the term ‘species’. (2)
In the first round of their study, the conservation biologists captured and marked 42 penguins. After
allowing some time for these penguins to reintegrate into their colony, a second round of sampling
was conducted, where 60 penguins were captured, including 17 that were previously marked.
(b) Suggest why it was important that the penguins reintegrated into their colony. (2)
2
, (c) Calculate the population of Humboldt penguins in the study area. Show your working. (2)
(d) Describe conservation strategies that could be used to protect Humboldt penguins in their
natural habitat. Suggest any potential conflicts that might arise from these conservation efforts. (5)
3
AQA A Level Biology course. We cannot however guarantee that it is an accurate representation of the
Summer 2025 examinations and students should not treat it as such. Please use this as an aid, alongside other
methods of revision.
AQA A Level
Friday 13 June 2025
Morning (Time: 2 hours)
Biology
Unit: 7402/2
Paper 2
You must have:
Calculator, ruler
Instructions
• Use black ink or a ball-point pen.
• Answer all questions.
• Answer the questions in the spaces provided.
○ There may be more space than you need.
• Show all the steps in any calculations and state the units.
Information
• The total mark for this paper is 91.
• The marks for each question are shown in brackets.
○ Use this as a guide as to how much time to spend on each question.
Advice
• Read each question carefully before you start to answer it.
• Write your answers neatly and in good English.
• Try to answer every question.
• Check your answers if you have time at the end.
Turn over →
© 2025 Empirical Tuition. All rights reserved.
, Answer all questions.
1. Humboldt penguins are a species of penguin that inhabit the coastal areas of Chile. Due to their
declining population numbers, conservation biologists have implemented a mark-release-recapture
program to assess the effectiveness of conservation efforts.
(a) Define what is meant by the term ‘species’. (2)
In the first round of their study, the conservation biologists captured and marked 42 penguins. After
allowing some time for these penguins to reintegrate into their colony, a second round of sampling
was conducted, where 60 penguins were captured, including 17 that were previously marked.
(b) Suggest why it was important that the penguins reintegrated into their colony. (2)
2
, (c) Calculate the population of Humboldt penguins in the study area. Show your working. (2)
(d) Describe conservation strategies that could be used to protect Humboldt penguins in their
natural habitat. Suggest any potential conflicts that might arise from these conservation efforts. (5)
3
