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Cowslips are flowering plants - Edexcel - GCSE Biology - Question 1 - 2015 - Paper 1
Question 1
Cowslips are flowering plants. Each cowslip stem can produce different numbers of flowers. The graphs show the number of flowers on 20 stems of cowslip growing in op... show full transcript
Worked Solution & Example Answer:Cowslips are flowering plants - Edexcel - GCSE Biology - Question 1 - 2015 - Paper 1
Step 1
Calculate the percentage of cowslip stems with flowers in open grassland
Answer
To find the percentage of cowslip stems that produce flowers in open grassland, we will use the formula:
From the graph, we observe that 3 stems have more than 0 flowers. Thus, substituting the numbers, we have:
Step 2
Explain why more flowers might grow in open grassland compared to woodland
Answer
There are several reasons why cowslips may produce more flowers in open grassland:
- Higher light intensity: Open grassland provides better access to sunlight, which is essential for photosynthesis.
- More rainfall: Increased rainfall can lead to better growth conditions for flowers.
- Warmer temperatures: The environment in grasslands is generally warmer, promoting growth.
- More resources: Grasslands may have more mineral ions and nutrients available in the soil, supporting plant growth.
Step 3
Step 4
Describe the process of diffusion in relation to gas exchange
Answer
Diffusion is the process through which gas molecules, such as carbon dioxide, move from an area of higher concentration to an area of lower concentration. This occurs through the stomata, allowing for necessary gas exchange in plants.