plumiIsolation and speciation: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 5.5.2 Isolation and speciation, 2019–2025, with mark schemes and examiner’s reports where available.
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Q3(a)
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All 6 questions on Isolation and speciation, as a list
- January 2024, Unit 4, Q3(a) (2 marks): State the meaning of the term sympatric speciation. (2)
- January 2024, Unit 4, Q3(b) (1 mark): Which row of the table represents sympatric speciation? The shapes shaded dark grey represent the original species and the shapes shaded light grey represent th
- January 2024, Unit 4, Q3(c)(i) (2 marks): Suggest two adaptations needed for this change in behaviour of the flies. (2)
- January 2024, Unit 4, Q3(c)(iii) (2 marks): Explain why it is an advantage for the hawthorn fly and the apple maggot fly to lay their eggs in the fruits of different plants. (2)
- January 2024, Unit 4, Q3(c)(iv) (2 marks): Suggest how these flies became reproductively isolated. Use the information in the diagram to support your answer. (2)
- June 2021, Unit 4, Q4(a) (4 marks): There are many different species of lemur, all of which evolved from one common ancestor. This common ancestor is thought to be a primate that was carried acros
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