plumiFactors affecting biodiversity: OCR A‑Level Biology A questions
OCR A-Level Biology A past-paper questions on 4.2.1.4 Factors affecting biodiversity, 2016–2025, with mark schemes and examiner’s reports where available.
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Q2(b)(i)
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All 19 questions on Factors affecting biodiversity, as a list
- June 2024, Paper 3, Q2(b)(i) (2 marks): Outline the differences between the bird and mammal results shown in the graph. [2]
- June 2024, Paper 3, Q2(b)(ii) (4 marks): A student looking at the graph concluded that ‘climate change is not a major threat to species biodiversity’. Evaluate this conclusion. [4]
- June 2024, AS Paper 1, Q26(a) (3 marks): Explain how agriculture can have a negative effect on biodiversity. [3]
- June 2024, AS Paper 1, Q26(b) (1 mark): State one factor other than agriculture that can have a negative effect on biodiversity. [1]
- June 2022, Paper 2, Q18(a)(i) (2 marks): Calculate the rate of change in wildebeest population between 1975 and 2007. Rate = animals per year [2]
- June 2022, Paper 2, Q18(a)(ii) (6 marks): The Maasai Mara is a grassland ecosystem in east Africa with a large range of wildlife. The human population in the area is increasing. An increasing human popu
- June 2019, AS Paper 2, Q3(b)(i) (1 mark): Suggest one reason why the wildcat was hunted. [1]
- June 2019, AS Paper 2, Q3(b)(ii) (6 marks): (ii)* Current estimates of the Scottish wildcat population vary. Recent reports by the Scottish Wildcat Association indicate that fewer than 100 individuals, po
- June 2018, Paper 2, Q17(b)(i) (3 marks): Discuss whether the information in Fig. 17 supports the scientists’ claim. You should refer to the data in Fig. 17 in your answer. [3]
- June 2018, Paper 2, Q17(b)(ii) (2 marks): Scientists working in the local area monitored water temperatures and populations of other water animals around the island between 1976 and 2010. Suggest two fu
- June 2018, AS Paper 2, Q5(a)(ii) (2 marks): Between 1913 and 2013 the approximate worldwide population of living elephants dropped from 10 000 000 to 500 000. Calculate how many orders of magnitude smalle
- June 2018, AS Paper 2, Q5(b) (2 marks): Fig. 5 shows the approximate percentages of elephants that were killed illegally in three different regions of Africa. Eastern Africa 100 80 number of 60 illega
- June 2017, AS Paper 2, Q5(a)(i) (2 marks): Calculate the total percentage decrease in the number of butterflies on farmland between 1992 and 2012. Show your working. Give your answer to the nearest whole
- June 2017, AS Paper 2, Q5(a)(ii) (2 marks): Using the data given in Fig. 5, compare the changes in the number of butterflies on farmland and on woodland between 1992 and 2012. [2]
- June 2017, AS Paper 2, Q5(a)(iii) (1 mark): Both habitats experienced the same weather conditions. Suggest a reason for the difference in the rates of decline in butterfly numbers in woodland and farmland
- June 2017, AS Paper 2, Q5(a)(iv) (2 marks): A student made the following statement: ‘These data show that the change in butterfly numbers was caused by changes in weather conditions in England.’ Comment o
- June 2017, AS Paper 2, Q5(b) (2 marks): Butterfly species in severe decline on farmland include gatekeeper, large skipper, small copper, wall brown, small tortoiseshell and white-letter hairstreak. Bu
- June 2016, AS Paper 1, Q23(c)(i) (2 marks): Suggest two reasons why this species is critically endangered in the wild. [2]
- June 2016, AS Paper 1, Q23(c)(ii) (2 marks): The remaining populations of D. sumatrensis are all small and are scattered in isolated areas. These are factors that might speed up the extinction of the speci
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