plumiSuccession: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 5.3.4 Succession, 2019–2025, with mark schemes and examiner’s reports where available.
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Q1(a)
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All 12 questions on Succession, as a list
- June 2025, Unit 4, Q1(a) (1 mark): Which term describes the events that took place to change the extinct volcano into a habitat for many species? (1) A entomology B evolution C speciation D succe
- October 2024, Unit 4, Q5(a) (1 mark): State the meaning of the term succession. (1)
- October 2024, Unit 4, Q5(c) (6 marks): Succession takes place as a glacier retreats. As the ice melts, bare rock is exposed. The graph shows the changes in the numbers of three different types of pla
- January 2024, Unit 4, Q4(b) (1 mark): Which letter on the diagram indicates the location of pioneer species only? (1) A P B Q C R D S
- January 2024, Unit 4, Q4(c)(i) (1 mark): Which term describes the changes in soil conditions and organisms with time? (1) A anthropogenic B evolution C speciation D succession
- January 2024, Unit 4, Q4(c)(ii) (6 marks): The table shows the soil carbon : nitrogen ratio in ground exposed by a retreating glacier. Length of time that the ground Carbon : nitrogen ratio in has been e
- June 2023, Unit 4, Q4(c)(i) (1 mark): Which sequence shows the succession of bacteria during the development of a giant panda? (1) A Clostridium → Streptococcus → Escherichia and Shigella B Escheric
- June 2022, Unit 4, Q8(a)(i) (3 marks): Describe three characteristics of pioneer species. (3)
- June 2022, Unit 4, Q8(a)(ii) (2 marks): Explain why succession occurs in stages. (2)
- June 2021, Unit 4, Q7(a)(i) (1 mark): The pH of a solution is a measure of the concentration of hydrogen ions in that solution. It is a log scale e.g. a solution of pH 5 contains 10-5 mol dm-3 of hy
- June 2021, Unit 4, Q7(a)(ii) (1 mark): Calculate the percentage increase in the number of plant species on the grey dune compared with the fore dune. (1) Answer %
- June 2021, Unit 4, Q7(a)(iii) (6 marks): Explain the changes in these sand dunes with distance from the sea. Use the information in the table to support your answer. (6)
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