Quelpr
2 marksRelationships Among Organisms

CSEC Biology · May/June 2014 · Paper 2 · Question 1(b)(iii)

Corals are found in shallow waters and contain microscopic algae known as zooxanthellae which contain chloroplasts. The corals provide the algae with carbon dioxide, shelter and protection, while the algae provide the corals with nutrients and oxygen.

Identify the type of feeding relationship between the coral and the zooxanthellae and give a reason for your answer.

The mark scheme is shown once you've answered.

Practise this question

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(c)(i)Represent the data in Table 1 on a suitable graph on the grid provided on page 7.[6 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]

More practice: the rest of this paper · more Relationships Among Organisms questions · all CSEC Biology past papers