The diagram shows apparatus used in an investigation to measure the rate of photosynthesis in Elodea (pondweed) at different wavelengths of light - Scottish Highers Biology - Question 9 - 2018
Question 9
The diagram shows apparatus used in an investigation to measure the rate of photosynthesis in Elodea (pondweed) at different wavelengths of light.
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Worked Solution & Example Answer:The diagram shows apparatus used in an investigation to measure the rate of photosynthesis in Elodea (pondweed) at different wavelengths of light - Scottish Highers Biology - Question 9 - 2018
Step 1
1. Use a measuring cylinder with a narrower diameter.
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Answer
Using a measuring cylinder with a narrower diameter can improve accuracy as it allows for easier measurement and minimizes the effect of surface tension on the water surface.
Step 2
2. Repeat the experiment several times and take averages.
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Answer
Repeating the experiment multiple times helps to account for random variations and provides a more reliable average measure of the rate of photosynthesis.
Step 3
3. Use a scale with more divisions.
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Answer
A scale with more divisions allows for more precise measurement of the volume of oxygen produced, thus enhancing measurement accuracy.
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