plumiSexual reproduction in plants: Edexcel A‑Level Biology B questions
Every Edexcel A-Level Biology B exam question on 2.5 Sexual reproduction in plants, 2016–2025, with its mark scheme and examiner’s report.
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Calculations
Q5(b)(i)
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Q5(b)(ii)
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Q5(c)
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Q6(a)(i)
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Q6(a)(ii)
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Q6(b)(i)
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Q6(b)(ii)
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Q2(a)(i)
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Q2(a)(ii)
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Q3(b)
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Q3(c)
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Q3(d)
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Q5(c)(i)
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Q5(c)(ii)
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Q5(c)(iii)
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Q5(b)(i)
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Q5(b)(ii)
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Q5(c)
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Q5(a)
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All 34 questions on Sexual reproduction in plants, as a list
- June 2025, Paper 3, Q5(b)(i) (2 marks): Calculate the mean rate of growth of the pollen tube in the 500 mg dm–3 calcium nitrate solution. Give your answer in µm per minute, to two decimal places. (2)
- June 2025, Paper 3, Q5(b)(ii) (3 marks): Give three conclusions that can be drawn from this investigation. (3)
- June 2025, Paper 3, Q5(c) (4 marks): Devise a method that could have been used to collect valid data in this investigation. (4)
- June 2025, AS Paper 1, Q6(a)(i) (1 mark): Which row of the table shows the role of each of these nuclei? (1) Role of nucleus P Q R control pollen fertilise the fertilise the A tube growth female nucleus
- June 2025, AS Paper 1, Q6(a)(ii) (1 mark): Which row of the table shows the number of sets of chromosomes each nucleus contains? (1) Number of sets of chromosomes P Q R A n n n B n 2n 2n C 2n n 2n D 2n 2
- June 2025, AS Paper 1, Q6(b)(i) (3 marks): Conclusion 1: species A has a wider range of temperatures for pollen grain germination. Comment on this conclusion. (3)
- June 2025, AS Paper 1, Q6(b)(ii) (4 marks): Conclusion 2: species A has a higher optimum temperature for germination than species B. Devise an investigation to confirm conclusion 2. (4)
- June 2024, Paper 2, Q2(a)(i) (3 marks): Describe how an embryo sac, containing eight haploid nuclei, is formed inside the ovary of a flower. (3)
- June 2024, Paper 2, Q2(a)(ii) (1 mark): Which row gives the correct chromosome number in these structures? (1) generative nucleus of endosperm cell embryo cell pollen grain A n n 2n B 2n 2n 2n C 3n n
- June 2023, AS Paper 1, Q3(b) (2 marks): Calculate the rate of growth of the pollen tubes, at 2 hours, for the 7.5 % lactose. Use a tangent to help you with your calculation. (2) Answer µm hour–1
- June 2023, AS Paper 1, Q3(c) (3 marks): Describe three conclusions that can be made from the results of this investigation. (3)
- June 2023, AS Paper 1, Q3(d) (2 marks): Give two reasons why lactose was an unusual choice of sugar to investigate. (2)
- June 2023, AS Paper 1, Q5(c)(i) (1 mark): When does mitosis take place? (1) A in the formation of stages 1, 4 and 6 B in the formation of stages 1, 2 and 5 C in the formation of stages 2, 4 and 5 D in t
- June 2023, AS Paper 1, Q5(c)(ii) (1 mark): Which shows the order of tissues that the pollen tube grows through to reach the embryo sac? (1) A stigma style ovary B stigma ovary style C style ovary stigma
- June 2023, AS Paper 1, Q5(c)(iii) (3 marks): Describe what happens to the polar nuclei once the pollen tube has grown into the embryo sac. (3)
- June 2022, Paper 3, Q5(b)(i) (2 marks): The diagram shows a pollen grain that has begun to germinate after landing on the surface of the stigma of a flower. wall of pollen grain cytoplasm A top of sti
- June 2022, Paper 3, Q5(b)(ii) (3 marks): Describe the process of double fertilisation in flowering plants. (3)
- June 2022, Paper 3, Q5(c) (5 marks): Devise an investigation to determine the effect of pH on the rate of growth of pollen tubes. (5)
- October 2020, Paper 1, Q1 (4 marks): The diagram shows a pollen tube entering the embryo sac of a flowering plant. K J L M Complete the table to give the name of each labelled structure and the num
- October 2020, Paper 3, Q5(a) (1 mark): The part labelled X contains triploid cells. Name the part labelled X. (1)
- October 2020, AS Paper 1, Q5(a) (3 marks): Describe the role of enzymes in the growth of the pollen tube. (3)
- October 2020, AS Paper 1, Q5(b) (3 marks): The styles of some plants secrete RNAase enzymes when pollen from the same flower germinates on the stigma. Explain how these RNAase enzymes affect the growth o
- October 2020, AS Paper 1, Q5(c) (4 marks): Explain the role of double fertilisation in flowering plants. (4)
- June 2019, Paper 3, Q3(a) (3 marks): The student used a paintbrush to obtain pollen grains from a flower. Describe the steps taken by the student to see these pollen grains using a microscope. (3)
- June 2019, Paper 3, Q3(c)(i) (2 marks): Explain why the student plotted standard deviation bars on the graph. (2)
- June 2019, Paper 3, Q3(c)(ii) (2 marks): Determine the time when the photograph was taken. (2) Answer minutes
- June 2017, Paper 2, Q3(a)(i) (1 mark): Which row of the table shows the correct description for these nuclei? (1) Zygote Endosperm Pollen tube nucleus nucleus nucleus A diploid diploid haploid B dipl
- June 2017, Paper 2, Q3(a)(ii) (1 mark): The production of plant gamete cells involves both mitosis and meiosis. The graph shows the DNA content of a cell during the production of a pollen grain. (1) 4
- June 2017, Paper 2, Q3(b)(i) (2 marks): The mean length of the pollen tubes in the control group was 7.5 mm. Calculate the mean length of the pollen tubes after adding 0.010 μg cm–3 of chemical A. (2)
- June 2016, AS Paper 1, Q1(a) (1 mark): In which part of the plant are pollen grains made? (1) A anther B embryo sac C filament D stigma
- June 2016, AS Paper 1, Q1(b) (1 mark): One species of grass has a diploid number of 14 chromosomes. Which row of the table is correct for this species of grass? (1) Chromosome number Nucleus P Nucleu
- June 2016, AS Paper 1, Q1(c) (1 mark): Which of the following is a correct statement? (1) A nucleus P divides by meiosis to form nuclei R and S B nucleus P divides by mitosis to form nuclei R and S C
- June 2016, AS Paper 1, Q1(d) (1 mark): The following three statements were made by a student: ● nucleus R and S will fertilise the endosperm nucleus ● the genetic material in nucleus R or S could bec
- June 2016, AS Paper 1, Q7(a) (4 marks): Analyse the results of this investigation to comment on each of these conclusions. (4)
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