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The data in the table shows the results from an investigation that measured growth in a species of wheat - HSC - SSCE Biology - Question 21 - 2009 - Paper 1
Question 21
The data in the table shows the results from an investigation that measured growth in a species of wheat. Temperature (°C) -5 0 5 10 12.5 15 ... show full transcript
Worked Solution & Example Answer:The data in the table shows the results from an investigation that measured growth in a species of wheat - HSC - SSCE Biology - Question 21 - 2009 - Paper 1
Step 1
Use the data to draw an appropriate graph.
Answer
To create the graph:
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Set up axes: Draw the X-axis (Temperature in °C) horizontally and the Y-axis (Relative growth in %) vertically. The X-axis should range from -5°C to 40°C, and the Y-axis should range from 0% to 100%.
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Label the axes: Clearly label the X-axis as 'Temperature (°C)' and the Y-axis as 'Relative Growth (%)'.
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Scale the axes: Choose an appropriate scale for both axes to accommodate all data points. For instance, mark every 5°C on the X-axis and appropriate intervals on the Y-axis (e.g., 0%, 20%, 40%, 60%, 80%, 100%).
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Plot the points: Using the data provided, plot the points on the graph as follows:
- (-5, 0)
- (0, 0)
- (5, 20)
- (10, 40)
- (12.5, 60)
- (15, 100)
- (17.5, 75)
- (20, 25)
- (22.5, 0)
- (25, 0)
- (27.5, 0)
- (30, 0)
- (35, 0)
- (40, 0)
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Connect the points with a line (for data that suggests continuity) to show trends more clearly.
Step 2
From the graph, describe how the growth of wheat responds to temperature.
Answer
From the graph, we can observe that wheat growth is highly dependent on temperature.
- Increasing temperature: Growth starts from 0% at -5°C and 0°C, then increases steadily as temperature rises to 15°C, where it reaches an optimal growth of 100%.
- Declining growth: After this peak at 15°C, relative growth declines sharply with increasing temperatures. At 20°C, growth decreases to 75%, and beyond 22.5°C, it continues to drop, ultimately returning to 0% by 40°C.
- Optimal growth range: The optimal temperature range for wheat growth appears to be between 10°C to 15°C, where growth is maximized.