QUESTION 22 (2 marks)
Explain how two abiotic factors affect the distribution of species in an ecosystem.
Ecosystem:
Abiotic factor 1:
Abiotic factor 2:
QCAA guide · typeset solution
QCAA sample response and mark allocation
22 | Ecosystem: Rainforest Abiotic factor 1: Availability of light: In a rainforest, light becomes less available in the understorey, so only plants that are adapted to low-light conditions can survive there. Abiotic factor 2: Availability of water: Rainforest frogs need to be distributed near pools of water for their tadpoles to grow and survive. | • explains how one abiotic factor affects the distribution of species in the identified ecosystem [1 mark] • explains how a second abiotic factor affects the distribution of species in the identified ecosystem [1 mark] |
QCAA sample response and marking criteria reproduced from the official guide.
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