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Ecology, Niches, and Interactions · CAPE Environmental Science Unit 1

64 past-paper questions on Ecology, Niches, and Interactions, part of Fundamental Ecological Principles, from every CAPE Environmental Science Unit 1 paper on Quelpr.

Practise Ecology, Niches, and Interactions
  1. 2(a)3 marks· CAPE Environmental Science Unit 1 · 2004 · Paper 1Explain the importance of natural selection in the survival of a species of organism.
  2. 2(b)6 marks· CAPE Environmental Science Unit 1 · 2004 · Paper 1Outline two alternatives a resident species has when facing a new selective pressure, stating clearly the conditions under which each is likely to occur.
  3. 3(a)(i)1 mark· CAPE Environmental Science Unit 1 · 2004 · Paper 1From Figure 2, identify the pH range of the soil for the zone of physiological stress.
  4. 3(a)(ii)1 mark· CAPE Environmental Science Unit 1 · 2004 · Paper 1From Figure 2, identify the pH range of the soil for the zone of intolerance.
  5. 3(a)(iii)1 mark· CAPE Environmental Science Unit 1 · 2004 · Paper 1From Figure 2, identify the pH range of the soil for the optimal range.
  6. 3(b)2 marks· CAPE Environmental Science Unit 1 · 2004 · Paper 1State two reasons why some factors affecting species survival are termed 'limiting factors'.
  7. 3(c)1 mark· CAPE Environmental Science Unit 1 · 2004 · Paper 1State one effect on a population when an abiotic factor shifts beyond its limit of tolerance.
  8. 4(b)2 marks· CAPE Environmental Science Unit 1 · 2004 · Paper 1State one feature common to an agricultural farm and a natural ecosystem.
  9. 1(a)4 marks· CAPE Environmental Science Unit 1 · 2004 · Paper 2Distinguish between 'habitat' and 'niche'.
  10. 1(c)12 marks· CAPE Environmental Science Unit 1 · 2004 · Paper 2Outline four possible reasons for the observations made in (b).
  11. 1(a)(i)2 marks· CAPE Environmental Science Unit 1 · 2005 · Paper 1Define and give an example of the hydrosphere.
  12. 1(a)(ii)2 marks· CAPE Environmental Science Unit 1 · 2005 · Paper 1Define and give an example of the lithosphere.
  13. 1(b)(i)1 mark· CAPE Environmental Science Unit 1 · 2005 · Paper 1Define the term 'ecotone'.
  14. 1(b)(ii)3 marks· CAPE Environmental Science Unit 1 · 2005 · Paper 1State three characteristics of ecotones.
  15. 2(a)2 marks· CAPE Environmental Science Unit 1 · 2005 · Paper 1Identify the two types of competition that occur in ecosystems.
  16. 2(b)4 marks· CAPE Environmental Science Unit 1 · 2005 · Paper 1Which of the two types of competition identified in (a) is more intense? Explain your answer.
  17. 9(b)3 marks· CAPE Environmental Science Unit 1 · 2005 · Paper 1Describe one relationship between these three ecosystems.
  18. 2(d)6 marks· CAPE Environmental Science Unit 1 · 2005 · Paper 2Explain how this community might be altered if the population of sea urchins died out.
  19. 3(a)(i)3 marks· CAPE Environmental Science Unit 1 · 2006 · Paper 1Explain, using an appropriate example, the interaction that occurs in commensalism.
  20. 3(a)(ii)3 marks· CAPE Environmental Science Unit 1 · 2006 · Paper 1Explain, using an appropriate example, the interaction that occurs in mutualism.
  21. 3(b)2 marks· CAPE Environmental Science Unit 1 · 2006 · Paper 1Distinguish between 'predation' and 'parasitism'.
  22. 1(a)(i)4 marks· CAPE Environmental Science Unit 1 · 2006 · Paper 2Explain the meaning of range of tolerance.
  23. 1(a)(ii)4 marks· CAPE Environmental Science Unit 1 · 2006 · Paper 2Explain the meaning of limiting factors.
  24. 1(b)6 marks· CAPE Environmental Science Unit 1 · 2008 · Paper 2Explain why non-native species may be successful in new environments, including TWO reasons in your response.
  25. 1(d)4 marks· CAPE Environmental Science Unit 1 · 2008 · Paper 2Explain the role of natural selection in the adaptation of species to their natural environment, including TWO points in your response.
  26. 2(a)(i)3 marks· CAPE Environmental Science Unit 1 · 2008 · Paper 2Define ecosystem.
  27. 1(a)4 marks· CAPE Environmental Science Unit 1 · 2009 · Paper 2Define what is meant by 'limiting factor' and state THREE ways in which limiting factors operate.
  28. 1(c)(ii)4 marks· CAPE Environmental Science Unit 1 · 2009 · Paper 2Explain using FOUR points how the variation in the algae population impacts the population of other species in the ecosystem.
  29. 3(b)4 marks· CAPE Environmental Science Unit 1 · 2009 · Paper 2Outline how predation may be of benefit to the prey population represented in Figure 2.
  30. 2(b)9 marks· CAPE Environmental Science Unit 1 · 2010 · Paper 2Suggest THREE inferences that can be made about the competition taking place among the amphibians in the grassland ecosystem.
  31. 3(a)3 marks· CAPE Environmental Science Unit 1 · 2010 · Paper 2Define the term 'ecological niche'.
  32. 3(b)(i)3 marks· CAPE Environmental Science Unit 1 · 2010 · Paper 2Describe the trend shown in Figure 2. Include specific values in your answer.
  33. 3(b)(ii)1 mark· CAPE Environmental Science Unit 1 · 2010 · Paper 2In which month was size of the predator population equal to 200?
  34. 3(b)(iii)1 mark· CAPE Environmental Science Unit 1 · 2010 · Paper 2What was the size of the prey population in Month 11?
  35. 3(b)(iv)6 marks· CAPE Environmental Science Unit 1 · 2010 · Paper 2Suggest TWO reasons why the predator population is successfully regulating the population of the prey.
  36. 3(c)6 marks· CAPE Environmental Science Unit 1 · 2010 · Paper 2Provide THREE reasons to support the statement above.
  37. 1(a)(i)1 mark· CAPE Environmental Science Unit 1 · 2011 · Paper 2State the type of symbiotic relationship shown in Figure 1.
  38. 1(a)(ii)4 marks· CAPE Environmental Science Unit 1 · 2011 · Paper 2Explain how the symbiotic relationship identified in (a)(i) could result in a population curve resembling Figure 1.
  39. 1(a)(iii)3 marks· CAPE Environmental Science Unit 1 · 2011 · Paper 2Evaluate the statement that the presence of Species 2 acts as a limiting factor for Species 1, providing one reason to justify your response.
  40. 1(a)4 marks· CAPE Environmental Science Unit 1 · 2012 · Paper 2Using an example other than agrochemicals, explain what is meant by the term 'limiting factor'.
  41. 1(c)(ii)4 marks· CAPE Environmental Science Unit 1 · 2012 · Paper 2Explain how the variation in the duckweed population may impact on the population of other aquatic species in the same ecosystem.
  42. 2(a)3 marks· CAPE Environmental Science Unit 1 · 2013 · Paper 2Outline the role played by natural selection in the evolution and adaptation of a species.
  43. 2(c)6 marks· CAPE Environmental Science Unit 1 · 2013 · Paper 2Provide an explanation for the distribution pattern of fish shown across the pH gradient in Figure 3.
  44. 1(c)4 marks· CAPE Environmental Science Unit 1 · 2014 · Paper 2Explain why phosphorus serves as a limiting growth factor in terrestrial ecosystems.
  45. 2(a)(i)3 marks· CAPE Environmental Science Unit 1 · 2014 · Paper 2Explain the trend observed in the population numbers of the predator and prey shown in the graph.
  46. 2(b)4 marks· CAPE Environmental Science Unit 1 · 2014 · Paper 2Explain the significance of natural selection in the evolution of species.
  47. 2(a)3 marks· CAPE Environmental Science Unit 1 · 2015 · Paper 2Outline the role of natural selection in the evolution of a species.
  48. 4(c)(ii)2 marks· CAPE Environmental Science Unit 1 · 2015 · Paper 2Suggest ONE reason for the trend observed for the native species in Figure 4.
  49. 1(c)4 marks· CAPE Environmental Science Unit 1 · 2016 · Paper 2Distinguish between intraspecific competition and interspecific competition, and explain why intraspecific competition is more intense.
  50. 2(c)3 marks· CAPE Environmental Science Unit 1 · 2016 · Paper 2Define the term 'limiting factor' and explain how limiting factors function within an environment.
  51. 2(d)3 marks· CAPE Environmental Science Unit 1 · 2016 · Paper 2Explain the role played by natural selection in the adaptation of species to their natural environment.
  52. 1(a)1 mark· CAPE Environmental Science Unit 1 · 2017 · Paper 2Define the term 'ecological niche'.
  53. 1(b)(i)1 mark· CAPE Environmental Science Unit 1 · 2017 · Paper 2State what the region 'X' represents in Figure 1.
  54. 1(b)(ii)4 marks· CAPE Environmental Science Unit 1 · 2017 · Paper 2Draw a diagram similar to Figure 1 showing how the niches of the two species will change over time.
  55. 1(c)(i)2 marks· CAPE Environmental Science Unit 1 · 2017 · Paper 2Identify two types of interactions, other than competition, between organisms in communities.
  56. 1(c)(ii)4 marks· CAPE Environmental Science Unit 1 · 2017 · Paper 2Define one of the types of interactions identified in (c)(i) and use an example to explain how it may influence the population numbers of an organism in an ecosystem.
  57. 1(c)(iii)2 marks· CAPE Environmental Science Unit 1 · 2017 · Paper 2Outline the role of adaptation in addressing the interaction discussed in (c)(ii).
  58. 2(a)(iii)3 marks· CAPE Environmental Science Unit 1 · 2017 · Paper 2The results in Table 2 show a type of interaction between Species A and Species B. Use the data in the table to explain this type of interaction.
  59. 2(b)(i)2 marks· CAPE Environmental Science Unit 1 · 2018 · Paper 2Define the term 'ecotone'.
  60. 2(b)(ii)6 marks· CAPE Environmental Science Unit 1 · 2018 · Paper 2Explain how any THREE abiotic conditions existing in Zone A and its surroundings may influence the biotic components found in this area.
  61. 2(b)(iii)4 marks· CAPE Environmental Science Unit 1 · 2018 · Paper 2Identify TWO limiting factors present at the reef crest and explain how BOTH factors may affect the population of corals in this area.
  62. 1(a)(i)2 marks· CAPE Environmental Science Unit 1 · 2019 · Paper 2Define the term 'fundamental niche'.
  63. 1(a)(ii)2 marks· CAPE Environmental Science Unit 1 · 2019 · Paper 2Define the term 'realized niche'.
  64. 1(c)(iii)3 marks· CAPE Environmental Science Unit 1 · 2019 · Paper 2Describe ONE example of commensalism that may occur in a marine ecosystem.

Related topics in Fundamental Ecological Principles