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Farmers can spray seeds with gibberellins to start germination - AQA - GCSE Biology - Question 3 - 2020 - Paper 1
Question 3
Farmers can spray seeds with gibberellins to start germination. What are two other uses of gibberellins? Tick (✓) two boxes. - To help in tissue culture - To help... show full transcript
Worked Solution & Example Answer:Farmers can spray seeds with gibberellins to start germination - AQA - GCSE Biology - Question 3 - 2020 - Paper 1
Step 1
What are two other uses of gibberellins?
Answer
Gibberellins are plant hormones with various applications. Two other uses are:
- To increase fruit size: Gibberellins promote cell elongation and division, resulting in larger fruit.
- To promote flower production: They can induce flowering in certain plant species, enhancing agricultural yields.
Step 2
Describe two improvements the students should make to their investigation.
Answer
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Keep temperature the same: It is essential to maintain a constant temperature across all dishes to ensure that temperature does not affect seedling growth, as varying temperatures can lead to inconsistent results.
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Use equal numbers of seedlings in each dish: This ensures that the growth conditions are uniform and comparability among the seedlings is achievable.
Step 3
Step 4
Explain what happened to the growth of the seedling on side Q compared with the growth on side P.
Answer
The seedling on side Q did not receive as much light as side P, resulting in slower growth. Under the influence of auxins, which are distributed unevenly, the cells on side Q experienced less stimulation for elongation, leading to a more compact growth compared to side P, which benefited from more light and thus more auxin activity.