QUESTION 1 (4 marks)
Explain how one abiotic and one biotic factor will affect the population of mosquito larvae in a freshwater pond.
QCAA guide · typeset solution
QCAA sample response and mark allocation
1 | An abiotic factor that would affect population would be temperature, because warmer water will evaporate faster, reducing the carrying capacity by limiting space. A biotic factor that would affect population would be food availability, because more food (e.g. algae or plankton) would result in a larger population of mosquito larvae. | • states a - relevant abiotic factor [1 mark] - relevant biotic factor [1 mark] • explains the effect of the identified - relevant abiotic factor [1 mark] - relevant biotic factor [1 mark] |
QCAA sample response and marking criteria reproduced from the official guide.
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