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The amount of water lost per unit area from the leaf surface of two different plants was measured - VCE - SSCE Biology - Question 4 - 2002 - Paper 1
Question 4
The amount of water lost per unit area from the leaf surface of two different plants was measured. Both plants were grown in the same conditions. The results are sho... show full transcript
Worked Solution & Example Answer:The amount of water lost per unit area from the leaf surface of two different plants was measured - VCE - SSCE Biology - Question 4 - 2002 - Paper 1
Step 1
A. plant 2 will be more likely to survive in a dry environment than plant 1.
Answer
To determine whether plant 2 is more likely to survive in a dry environment, it is essential to assess its water loss pattern. If plant 2 exhibits lower water loss during peak sunlight hours than plant 1, it suggests better adaptation to dry conditions. Analyzing the graph shows that plant 2 generally maintains lower water loss, thus supporting the conclusion.
Step 2
B. at 12.00 noon, plant 1 has a greater water loss per unit area than plant 2.
Answer
At 12.00 noon, the graph indicates that plant 1 indeed has a higher water loss compared to plant 2. This suggests that plant 1 may have higher transpiration rates under similar conditions, indicating more vulnerability to water stress.
Step 3
C. at 10.00 am the average stomatal aperture will be greater in plant 1 than in plant 2.
Answer
By interpreting the data at 10.00 am, we can infer that a greater water loss from plant 1 may imply larger stomatal apertures compared to plant 2. This larger aperture facilitates more transpiration, crucial for assessing stomatal behavior.
Step 4
D. at 5.00 pm the rate of photosynthesis will be greater in plant 2 than in plant 1.
Answer
At 5.00 pm, if plant 2 demonstrates reduced water loss while maintaining photosynthetic processes, this could indicate its higher efficiency in photosynthesis compared to plant 1. The graph likely supports this by showing different loss rates at this time.