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Seedlings were grown with a light-proof cap over the tip - OCR Gateway - GCSE Biology - Question 9 - 2018 - Paper 1

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Seedlings were grown with a light-proof cap over the tip. The seedlings had light from one direction only. At start Light-proof cap Light After two days Which dia... show full transcript

Worked Solution & Example Answer:Seedlings were grown with a light-proof cap over the tip - OCR Gateway - GCSE Biology - Question 9 - 2018 - Paper 1

Step 1

Identify the conditions of the experiment

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Answer

The seedlings are subjected to light coming from one direction, while the tip is covered by a light-proof cap. This setup prevents the tip of the seedling from experiencing light.

Step 2

Understand seedling phototropism

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Answer

Phototropism is the growth of a plant in response to light. Since the seedlings receive light from one side, they should grow towards that light source, bending accordingly.

Step 3

Analyze the diagrams

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Examine each diagram (A, B, C, D) to determine which one depicts the seedling bending towards the light direction. Given the direction of light and the light-proof cap over the tip, the seedling will show growth away from the cap and towards the light.

Step 4

Select the correct diagram

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Answer

The correct diagram is C, as it shows the seedling bending away from the light-proof cap and towards the light source.

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