A species of buttercup (A) is thought to be able to accumulate nickel in its tissues. A comparable species (B) is not an accumulator.
Species A therefore may be useful for removing nickel pollution from the soil.
Each species of buttercup were seeded into two separate plots, one of which had previously been treated with 3g of nickel sulphate per square meter. Watering and other variables were controlled in all the plots.
A month after germination, the populations were counted using quadrats of 1m2 and the following results were obtained:
Species
Untreated plot
Treated plot
A
486 plants in 6 quadrats
608 plants in 8 quadrats
B
584 plants in 8 quadrats
115 plants in 5 quadrats
Calculate comparable results and a suitable unit for the plant population in the two plots (2 marks)
Species
Density of plants in the Untreated plot. Plants/m2
Density of plants in the treated plot.
Plants/m2
A
B
Suggest a hypothesis to explain the difference in populations of the two species in the treated and untreated plots.(2 marks)
Complete the table for each plant and perform the X2 test to test whether there is a significant difference in the populations of species A in the two plots measured, one untreated and one treated with Nickel sulphate. (5 marks)
Answers
Answer:
A species of buttercup (A) is thought to be able to accumulate nickel in its tissues. A comparable species (B) is not an accumulator.
Species A therefore may be useful for removing nickel pollution from the soil.
Each species of buttercup were seeded into two separate plots, one of which had previously been treated with 3g of nickel sulphate per square meter. Watering and other variables were controlled in all the plots.
A month after germination, the populations were counted using quadrats of 1m2 and the following results were obtained:
Species
Untreated plot
Treated plot
A
486 plants in 6 quadrats
608 plants in 8 quadrats
B
584 plants in 8 quadrats
115 plants in 5 quadrats
Calculate comparable results and a suitable unit for the plant population in the two plots (2 marks)
Species
Density of plants in the Untreated plot. Plants/m2
Density of plants in the treated plot.
Plants/m2
A
B
Suggest a hypothesis to explain the difference in populations of the two species in the treated and untreated plots.(2 marks)
Complete the table for each plant and perform the X2 test to test whether there is a significant difference in the populations of species A in the two plots measured, one untreated and one treated with Nickel sulphate. (5 marks)
Answer:
Explanation:
not sure