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Look at the diagram of a potometer - OCR Gateway - GCSE Biology (Combined Science) - Question 6 - 2018 - Paper 1
Question 6
Look at the diagram of a potometer. How can the apparatus be changed to increase the rate of water uptake? A Add more water to the beaker B Place an electric fan ... show full transcript
Worked Solution & Example Answer:Look at the diagram of a potometer - OCR Gateway - GCSE Biology (Combined Science) - Question 6 - 2018 - Paper 1
Step 1
B Place an electric fan next to the apparatus and switch the fan on
Answer
To increase the rate of water uptake in the plant, one effective method is to place an electric fan next to the apparatus and switch it on. This action creates a breeze which enhances the evaporation of water from the leaves. Increased evaporation results in a greater transpiration rate, thereby drawing more water from the potometer's beaker into the plant. Consequently, the overall water uptake will be increased as the plant takes up more water to replace what has been lost through transpiration.