The diagram shows a potometer. A student wants to test the hypothesis that the number of stomata on a plant affects water loss. They first record the distance the gas bubble moves in 10 minutes. What should the student do next before taking a second reading to test this hypothesis? A Cover the plant with a black plastic bag. B Remove some of the leaves. C Repeat the test in a warmer room. D Use an electric fan to move the air.

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The diagram shows a potometer - OCR Gateway - GCSE Biology - Question 2 - 2022 - Paper 1

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The diagram shows a potometer. A student wants to test the hypothesis that the number of stomata on a plant affects water loss. They first record the distance the ... show full transcript

Worked Solution & Example Answer:The diagram shows a potometer - OCR Gateway - GCSE Biology - Question 2 - 2022 - Paper 1

Step 1

Cover the plant with a black plastic bag.

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Covering the plant with a black plastic bag would likely minimize water loss through evaporation and transpiration, allowing for a more accurate measurement of stomatal function under controlled conditions.

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The diagram shows a potometer - OCR Gateway - GCSE Biology - Question 2 - 2022 - Paper 1

Worked Solution & Example Answer:The diagram shows a potometer - OCR Gateway - GCSE Biology - Question 2 - 2022 - Paper 1

Cover the plant with a black plastic bag.

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