DP Biology Questionbank
C.3 Impacts of humans on ecosystems
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| Nature of science: Assessing risks and benefits associated with scientific research—the use of biological control has associated risk and requires verification by tightly controlled experiments before it is approved. (4.8) |
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Directly related questions
- 16N.3.SL.TZ0.14a: Outline the trend in the number of people with malaria during the period when the use of...
- 16N.3.SL.TZ0.14b: One pesticide used in killing mosquitoes was DDT. Considering its harmful effects,...
- 16N.3.HL.TZ0.15c: Outline the effect of wind on the distribution of plastic pollution in this lake.
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16N.3.HL.TZ0.15a:
Predict one example of macroplastic pollution that is likely to be found in this lake.
- 16N.3.HL.TZ0.15d: Suggest changes in the management of the national park that could reduce the amount of...
- 16N.3.HL.TZ0.15b: State two possible effects on organisms of microplastic pollution.
- 17M.3.SL.TZ1.15b: State the origin of cane toads.
- 17M.3.SL.TZ1.15c: Evaluate the use of traps containing toxin as a means of cane toad control.
- 17M.3.SL.TZ1.15a: Outline one consequence of introducing an alien species into an ecosystem.
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17M.3.HL.TZ1.14c:
Indicator species may be affected by biomagnification. Discuss biomagnification using a named example of a pollutant.
- 20N.3.SL.TZ0.12b: Outline the principle of competitive exclusion.
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20N.3.SL.TZ0.13b.ii:
Describe how ingested plastics can cause problems to marine birds.
- 20N.3.SL.TZ0.13a.ii: Suggest how entanglement in plastics can lead to the death of marine birds.
- 20N.3.SL.TZ0.13b.i: Identify the group with the greatest number of species with problems due to ingestion of plastics.
- 20N.3.SL.TZ0.13a.i: Calculate the number of species of grebe with problems due to entanglement.
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20N.3.HL.TZ0.15c:
Sea urchins are destroying the giant kelp alga (Macrocystis pyrifera) marine forests of South East Australia. Suggest a reason that sea urchins might be an invasive species in this environment.
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17N.3.SL.TZ0.12c:
Explain how pesticides may undergo biomagnification in the lake.
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17N.3.SL.TZ0.13a:
Compare and contrast the effects of the predators on the population of the mussels.
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17N.3.HL.TZ0.14a.iii:
Suggest a method to limit the impact of F. silvestris on native species.
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17N.3.HL.TZ0.16c:
Outline three issues arising from the release of pollutants into the environment.
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17N.3.HL.TZ0.14a.ii:
Describe how invasive species such as F. silvestris can have a significant impact on native species.
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17N.3.HL.TZ0.14a.i:
Identify how the pattern in mammals is different from reptiles and birds.
- 18N.3.SL.TZ0.14a: State which plant can be cut in August.
- 18N.3.SL.TZ0.14c: Outline reasons for controlling invasive plants.
- 18N.3.SL.TZ0.14b: Suggest a reason for not cutting invasive plants at certain times of year.
- 18N.3.SL.TZ0.14d: Discuss what precautions should be taken before considering biological control of the invasive...
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18M.3.HL.TZ1.16d:
The map shows an area of the Pacific Ocean characterized by exceptionally high concentrations of plastics and other debris that have been trapped by the currents of the North Pacific Gyre.
Outline one consequence of marine plastic pollution.
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18M.3.HL.TZ1.16c:
Using one example, outline biological control of an invasive alien species.
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18M.3.HL.TZ1.16e:
Explain the consequences of biomagnification.
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18M.3.HL.TZ1.16a:
Define invasive alien species.
- 18M.3.HL.TZ1.16b: Discuss the global impacts of invasive alien species.
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19M.3.SL.TZ1.13:
Outline three ways in which a named environmental disturbance can impact an ecosystem.
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19M.3.SL.TZ1.14:
Explain what is meant by competitive exclusion, with respect to a named example of an invasive species.
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- 19M.3.HL.TZ1.14b: Phosphate can be lost from agricultural land in several different ways. State one of these.
- 19M.3.HL.TZ1.16a.i: Distinguish between levels of predation in marmots born in the wild and those born in captivity.
- 19M.3.HL.TZ1.16a.ii: Suggest reasons for the differences in predation.
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19M.3.SL.TZ2.13:
The diagram shows the copper concentration (μg g–1) in the seaweed Porphyra umbilicalis collected along the shoreline in Arklow, Ireland.
[Source: reprinted by permission from Springer Nature: Helgoländer Meeresuntersuchungen,
Problems in the assessment of heavy-metal levels in estuaries and the formation of a pollution index,
D L Tomlinson, et al., 33, issue 1, pages 566–575. Copyright 1980]Explain how the copper found in these seaweeds could affect the birds living in Arklow town.
- 19N.3.SL.TZ0.14b: Describe the use of indicator species in monitoring environmental change.
- 19N.3.SL.TZ0.15b.ii: Outline the impact of alien species on endemic species in ecosystems.
- 19N.3.HL.TZ0.15a: Compare and contrast the information provided for baleen whales and sea turtles.
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19N.3.SL.TZ0.14a:
Explain how the levels of the Caesium (Cs) radioisotopes could have accumulated in the tissues of these fish.
- 19N.3.SL.TZ0.15b.i: State an example of an alien species.
- 19N.3.HL.TZ0.15b: Outline how plastic ingestion may lead to biomagnification in these marine species.
