Are the factors in Table 1 biotic or abiotic?
Tick one box for each factor - AQA - GCSE Biology: Combined Science - Question 1 - 2018 - Paper 2
Question 1
Are the factors in Table 1 biotic or abiotic?
Tick one box for each factor.
Table 1
| Factor | Biotic | Abiotic |
|-------------|--------|---------|
| Disease... show full transcript
Worked Solution & Example Answer:Are the factors in Table 1 biotic or abiotic?
Tick one box for each factor - AQA - GCSE Biology: Combined Science - Question 1 - 2018 - Paper 2
Step 1
1.2 Explain why the students thought their hypothesis would be correct.
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Answer
The students hypothesized that as they move away from the tree, light intensity would increase, which is essential for photosynthesis. Plants typically require more light to grow, and with increased light intensity, they believed they would observe more plant growth as they moved further from the tree.
Step 2
1.3 Give the scientific name of each piece of equipment.
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Answer
The square frame used is referred to as a 'quadrant', and the electronic device to measure light intensity is known as a 'light meter'.
Step 3
1.4 Calculate the total area sampled.
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Answer
The total area sampled is calculated as follows:
Total area sampled = length × width = 0.5 m × 0.5 m = 0.25 m².
Step 4
1.5 Suggest one reason why the whole investigation was done as quickly as possible.
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Answer
To keep the light intensity as similar as possible during the investigation, as changes in light could affect the results.
Step 5
1.6 Give one way the investigation could be improved.
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Answer
The investigation could be improved by repeating it in different directions around the tree to get a more comprehensive understanding of the light variation.
Step 6
1.7 Which plant species in Table 2 will only grow at high light intensity?
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Answer
The plant species that will only grow at high light intensity is 'daisy'.
Step 7
1.8 What conclusion can be made about the relationship between light intensity and the total percentage cover of plants?
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Answer
The conclusion is that as light intensity increases, the total percentage cover of plants also tends to increase. Data from Table 2 shows that at a light intensity of 175 units, the total cover reaches its maximum at 100%.
Step 8
1.9 Suggest one different factor that may cause these results.
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Answer
One factor could be 'water availability' because the roots of the plants may be absorbing moisture from the soil, which directly influences plant growth. Another reason could be 'nutrient levels' in the soil, affecting overall plant health and development.
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