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2 marksEcological Studies and Factors

CSEC Biology · May/June 2010 · Paper 2 · Question 1(a)(ii)

An experiment was conducted on a plant species (Figure 1) where part X was tested after plants grew in three different light intensities. Sets of three plants for each light intensity were tested for starch, reducing sugar, protein, and oil.

Explain why a sample of three plants was used for each test.

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Other parts of this question

  1. 1(a)(i)In the space provided below construct a table to show how the data from the experiment might be collected.[5 marks]
  2. 1(b)In the space provided below, draw a labelled diagram of the apparatus that can be used in an experiment to illustrate that Part Z will take in water for use by…[4 marks]
  3. 1(c)One function of the plant part shown at Y is storage. Identify ONE organ in the human body that serves the same function.[1 mark]
  4. 1(d)Humans also carry out other functions similar to that shown by the plant species represented at Figure 1, for example, respiration. In investigating…[3 marks]
  5. 1(e)(i)On the diagram in Figure 2, label the following parts using the symbols indicated: P for the place where pollen is produced, O for the place that houses the…[3 marks]
  6. 1(e)(ii)Suggest how this flower might be pollinated. Explain your answer.[3 marks]
  7. 1(f)Some plant storage organs give rise to offspring. Suggest TWO advantages to the plant of having both flowers, and a storage organ that gives rise to offspring.[4 marks]

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