Dodder is a plant that grows up blueberry bushes using root-like structures to remove sugar and other nutrients from the stems of the blueberry bushes - Scottish Highers Biology - Question 14 - 2023
Question 14
Dodder is a plant that grows up blueberry bushes using root-like structures to remove sugar and other nutrients from the stems of the blueberry bushes.
(a) The rela... show full transcript
Worked Solution & Example Answer:Dodder is a plant that grows up blueberry bushes using root-like structures to remove sugar and other nutrients from the stems of the blueberry bushes - Scottish Highers Biology - Question 14 - 2023
Step 1
Identify this type of symbiosis.
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Answer
Parasitism.
Step 2
Justify your answer.
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Answer
Dodder benefits from the blueberry bush while the blueberry is harmed or at a disadvantage due to the dodder removing nutrients, sugars, and energy from it.
Step 3
Calculate the reduction in blueberry yield due to the dodder infection.
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Answer
To find the reduction:
Average yield without dodder = 22,500 kg/hectare.
Average yield with dodder = 18,000 kg/hectare.
Reduction in yield per hectare = 22,500 - 18,000 = 4,500 kg/hectare.
Total area = 6.7 hectares.
Total reduction = 4,500 kg/hectare × 6.7 hectares = 30,150 kg.
Step 4
Explain why the uninfected field is included as a control in this investigation.
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Answer
The uninfected field serves as a control to show the effect of dodder on blueberry yield, allowing for comparison and isolating the influence of the dodder infection.
Step 5
State what this would be considered as good experimental design.
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This would be considered good experimental design as it eliminates biases and allows for a thorough comparison of the treatments, ensuring that results are valid.
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