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Nothofagus gunnii is a deciduous beech tree that grows in Tasmania - HSC - SSCE Biology - Question 23 - 2007 - Paper 1
Question 23
Nothofagus gunnii is a deciduous beech tree that grows in Tasmania. When environmental temperatures decrease at the beginning of winter the beech tree drops its leav... show full transcript
Worked Solution & Example Answer:Nothofagus gunnii is a deciduous beech tree that grows in Tasmania - HSC - SSCE Biology - Question 23 - 2007 - Paper 1
Step 1
Design a Procedure to Investigate Leaf Drop Temperature
Answer
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Gather Materials: Collect potted beech seedlings, a thermometer, a controlled environment chamber (or location), and a data recording sheet.
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Set Up the Experiment: Place each beech seedling in a temperature-controlled environment. Ensure that the initial temperature is recorded as room temperature, around 20°C.
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Gradually Decrease Temperature: Reduce the temperature in the environment gradually, by 1-2°C every day until a predetermined minimal temperature is reached (e.g., 5°C).
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Monitor and Record Data: Daily check the seedlings and note the temperature at which the first leaves begin to turn brown and drop. Record any additional observations, such as changes in leaf color or wilting.
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Repeat for Accuracy: Conduct the experiment multiple times to ensure the accuracy and reliability of the results. Average the temperature at which leaves drop across trials for consistency.