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1 markFood and Nutrition

CSEC Integrated Science · 2009 · Paper 2 · Question 1(e)(ii)

Reproduction of the unicellular organism occurred in a flask containing water and glucose. Over three weeks, the population increased then decreased.

What is the likely effect on the population of the organisms if the temperature of the flask is raised to 80 °C?

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Other parts of this question

  1. 1(a)Name each of the structures labelled A, B, C and D.[2 marks]
  2. 1(b)Outline two differences between the flowering plant and the reproducing unicellular organism shown in the figures.[2 marks]
  3. 1(c)(i)Identify in Figure 1 two structures that are associated with sexual reproduction.[2 marks]
  4. 1(c)(ii)Identify in Figure 1 one structure that is associated with asexual reproduction.[1 mark]
  5. 1(d)(i)Which of the labelled parts of the flowering plant should the farmer use?[1 mark]
  6. 1(d)(ii)Give a reason for your choice of plant part in (d)(i).[1 mark]
  7. 1(d)(iii)State one advantage and one disadvantage of cultivating genetically identical trees.[2 marks]
  8. 1(e)(i)Suggest two likely reasons for the decrease in the population of organisms.[2 marks]
  9. 1(e)(iii)Give one reason for your answer in (e)(ii).[1 mark]

More practice: the rest of this paper · more Food and Nutrition questions · all CSEC Integrated Science past papers