Figure 8 shows a cross-section of a root nodule on a leguminous plant - Edexcel - GCSE Biology - Question 5 - 2022 - Paper 1
Question 5
Figure 8 shows a cross-section of a root nodule on a leguminous plant.
Bacteria in the root nodule provide the leguminous plant with nitrogen compounds.
The legumi... show full transcript
Worked Solution & Example Answer:Figure 8 shows a cross-section of a root nodule on a leguminous plant - Edexcel - GCSE Biology - Question 5 - 2022 - Paper 1
Step 1
Which term describes the relationship between this leguminous plant and the bacteria?
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Answer
The relationship between the leguminous plant and the bacteria is best described as mutualism (option D). In this symbiotic relationship, both organisms benefit: the plant receives nitrogen compounds from the bacteria, while the bacteria obtain sugars from the plant.
Step 2
Give the width in μm.
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Answer
To convert the width from millimeters to micrometers, use the conversion factor: 1 mm = 1000 μm. Therefore, for a width of 7.5 mm:
