Quelpr

Ecological Studies and Factors · CSEC Biology

44 past-paper questions on Ecological Studies and Factors, part of Living Organisms in the Environment, from every CSEC Biology paper on Quelpr.

Practise Ecological Studies and Factors
  1. 1(a)5 marks· Biology Q1 1(a)Plot the data from Table 1 on the grid provided on page 5.
  2. 1(a)(i)2 marks· Biology Q1 1(a)(i)The distribution of the different plant and animal species changes from the water's edge to the highway. Name TWO additional pieces of apparatus the students will need to investigate the changing distribution of plant…
  3. 1(a)(i)2 marks· Biology Q1 1(a)(i)Calculate the percentage of air in Sample A. Show your working.
  4. 1(a)(i)4 marks· Biology Q1 1(a)(i)In the space provided below, construct a pie chart to show the relative proportions of the organisms the students found occupying the habitat.
  5. 1(a)(ii)2 marks· Biology Q1 1(a)(ii)Describe how EACH piece of apparatus you named in (a) (i) can be used to study the distribution of plant species in this area.
  6. 1(a)(ii)2 marks· Biology Q1 1(a)(ii)Explain why a sample of three plants was used for each test.
  7. 1(a)(ii)2 marks· Biology Q1 1(a)(ii)How do you account for the difference in the proportion of air in Samples A and B?
  8. 1(a)(ii)2 marks· Biology Q1 1(a)(ii)What is the advantage of using a pie chart to represent the data in Table 1?
  9. 1(a)(iii)1 mark· Biology Q1 1(a)(iii)Identify another means besides a table and pie chart to represent the data in Table 1.
  10. 1(b)4 marks· Biology Q1 1(b)Name and outline TWO possible sampling methods that the students may have used to collect the data shown in Table 1.
  11. 1(b)(i)1 mark· Biology Q1 1(b)(i)State ONE precaution that should be taken when using the quadrat to determine the distribution of the plant species.
  12. 1(b)(i)2 marks· Biology Q1 1(b)(i)What is the volume of water in EACH cylinder as shown in Figure 2? Cylinder 1: Cylinder 2:
  13. 1(b)(ii)2 marks· Biology Q1 1(b)(ii)Which measuring cylinder represents drainage from Sample B? Give a reason for your answer.
  14. 1(b)(ii)2 marks· Biology Q1 1(b)(ii)Calculate the species density of the small flowering shrub in the area. (Show your working.)
  15. 1(b)(ii)2 marks· Biology Q1 1(b)(ii)Suggest TWO long-term effects on the habitat, if a pair of flycatchers (insect-eating birds) suddenly enter the habitat under study.
  16. 1(b)(iii)2 marks· Biology Q1 1(b)(iii)Name TWO factors OTHER THAN light that could have influenced the larvae's response.
  17. 1(b)(iii)2 marks· Biology Q1 1(b)(iii)Calculate the volume of water retained by EACH sample of soil.
  18. 1(b)(iii)2 marks· Biology Q1 1(b)(iii)Suggest a reason for such a large number of succulent plants in the area.
  19. 1(b)(iv)1 mark· Biology Q1 1(b)(iv)Identify ONE source of error in the investigation of soil drainage.
  20. 1(b)(v)2 marks· Biology Q1 1(b)(v)Explain why it is important to investigate water retention properties of soils.
  21. 1(c)7 marks· Biology Q1 1(c)Describe how data may be collected to construct the terrestrial food web in Figure 1. Make a list of the materials and apparatus required and state ONE precaution to be taken in collecting the data.
  22. 1(c)(iii)2 marks· Biology Q1 1(c)(iii)State TWO physical factors that could affect the population of the organisms that live in the pond.
  23. 1(c)(iii)2 marks· Biology Q1 1(c)(iii)Organisms 1 and 3 in Figure 3 are usually found under stones or leaf litter. Suggest TWO reasons why these organisms are found in this type of habitat.
  24. 1(c)(iv)a)4 marks· Biology Q1 1(c)(iv)a)List the apparatus you would need.
  25. 1(c)(iv)b)4 marks· Biology Q1 1(c)(iv)b)Describe the method you would use.
  26. 1(d)4 marks· Biology Q1 1(d)In the space provided below, construct a table to present the data to be collected for constructing the terrestrial food web.
  27. 1(e)2 marks· Biology Q1 1(e)Suggest TWO ways in which the data to be collected may be summarized or represented, apart from food webs.
  28. 1(f)(i)2 marks· Biology Q1 1(f)(i)How would the method differ from that described in (c), if you wished to gather data to construct the aquatic food web?
  29. 1(f)(ii)2 marks· Biology Q1 1(f)(ii)Explain why the method would be different for collecting data for the aquatic food web.
  30. 2(a)(i)2 marks· Biology Q2 2(a)(i)Name TWO biotic factors and ONE abiotic factor that may account for the extinction of a species.
  31. 2(b)3 marks· Biology Q2 2(b)List THREE features of an environment which support living organisms.
  32. 3(b)(iii)3 marks· Biology Q3 3(b)(iii)Suggest why coconut trees are usually found along the coastlines of islands while red pea plants are found inland.
  33. 3(c)2 marks· Biology Q3 3(c)Identify TWO factors or activities, OTHER THAN feeding, that are necessary for the survival of organisms in an ecosystem.
  34. 4(c)(iii)1 mark· Biology Q4 4(c)(iii)Suggest ONE beneficial effect of organic fertilisers on soil.
  35. 5(a)6 marks· Biology Q5 5(a)Define EACH of the following terms with reference to the mangrove swamp ecosystem: Population Physical (abiotic) factors Habitat
  36. 5(a)(i)4 marks· Biology Q5 5(a)(i)Identify TWO biotic and TWO abiotic factors illustrated in the diagram.
  37. 5(a)(ii)4 marks· Biology Q5 5(a)(ii)Suggest TWO ways in which any of the biotic and abiotic factors interact.
  38. 6(a)(i)6 marks· Biology Q6 6(a)(i)Distinguish between a community and a habitat.
  39. 6(a)(ii)6 marks· Biology Q6 6(a)(ii)Some students want to investigate the distribution of species found in a forest while another group wants to investigate the distribution of species in a pond. Describe the sampling technique that the students could use…
  40. 6(a)(ii)2 marks· Biology Q6 6(a)(ii)Describe briefly a technique for sampling organisms in the pond.
  41. 6(c)(i)6 marks· Biology Q6 6(c)(i)Identify TWO physical factors which animals encounter (face) in an aquatic habitat, such as a freshwater pond.
  42. 6(c)(ii)1 mark· Biology Q6 6(c)(ii)Suggest TWO adaptations that animals in a freshwater pond might have. Explain how EACH adaptation is useful to the animal.
  43. 3(c)(i)1 mark· CSEC Biology · May/June 2021 · Paper 2Identify one biotic factor that would affect the organisms shown in Figure 3.
  44. 3(c)(ii)1 mark· CSEC Biology · May/June 2021 · Paper 2Identify one abiotic factor that would affect the organisms shown in Figure 3.

Related topics in Living Organisms in the Environment