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The features of leaves shown in the diagram are adaptations found in some Australian plants - HSC - SSCE Biology - Question 7 - 2005 - Paper 1
Question 7
The features of leaves shown in the diagram are adaptations found in some Australian plants. I. Vertically hanging leaves II. Hairs on leaf III. Reduced leaves W... show full transcript
Worked Solution & Example Answer:The features of leaves shown in the diagram are adaptations found in some Australian plants - HSC - SSCE Biology - Question 7 - 2005 - Paper 1
Step 1
What is the function of these adaptations?
Answer
The adaptations depicted in the diagrams are primarily aimed at reducing water loss in plants, especially in arid environments such as Australia.
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Vertically hanging leaves (I): These leaves minimize the exposure to direct sunlight, thereby reducing evaporation and conserving moisture.
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Hairs on leaf (II): The presence of hairs can create a microclimate around the leaf, trapping moisture and reducing the airflow across the leaf surface, which also decreases evaporation rates.
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Reduced leaves (III): By having smaller leaves, the surface area for water loss is decreased. This adaptation is common in succulents and other drought-resistant plants.
Based on the analysis of these adaptations, the most suitable answer from the options provided is (C) Assist in reducing water loss.