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6 marksPopulation Growth and Survival Factors

CSEC Biology · May/June 2014 · Paper 2 · Question 1(c)(i)

Marine biologists collected data on the estimated population size of parrotfish and a predatory fish at six-month intervals over a three-year period. Table 1 presents this data.

Represent the data in Table 1 on a suitable graph on the grid provided on page 7.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 1(a)(i)Construct a table in the space below to classify the fish in Figure 1 into groups using TWO visible features other than size.[3 marks]
  2. 1(a)(ii)A gill from one of the fish is shown in Figure 2. Annotate Figure 2 to illustrate TWO characteristics that make the gill suitable for gaseous exchange.[2 marks]
  3. 1(a)(iii)State TWO reasons why gaseous exchange is important in living organisms.[2 marks]
  4. 1(b)(i)Identify TWO producers in the food web in Figure 3.[2 marks]
  5. 1(b)(ii)State TWO characteristics of producers in a food web.[2 marks]
  6. 1(b)(iii)Identify the type of feeding relationship between the coral and the zooxanthellae and give a reason for your answer.[2 marks]
  7. 1(c)(ii)Suggest an explanation for the differences in the shapes of the graphs.[2 marks]
  8. 1(c)(iii)Name TWO features that the predatory fish may have that allow it to carry out its role as a predator.[2 marks]
  9. 1(c)(iv)Suggest what the likely consequences would be if the population size of the predatory fish is NOT controlled.[2 marks]

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