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Sustainability and Change · Paper 1 — Free Biology HL Practice Questions
1FoundationMCQRenewable resources and ecological conservation1 markPaper 1~2 min
A coastal mangrove ecosystem is assed for its ecosystem services. Which of the following services provided by mangroves is correctly classified as a regulating service?
Solutions
2FoundationMCQRenewable resources and ecological conservation1 markPaper 1~2 min
A conservation team is restoring a degraded grassland where a native grazer was removed 50 years ago. Monitoring shows that a single fast-growing grass species now dominates, suppressing most other plant species. The team predicts that reintroducing the grazer will increase plant species diversity. Which ecological principle best supports this prediction?
Solutions
3MasteryMCQSustainable agricultural practices1 markPaper 1~2 min
A farmer uses a sustainable intercropping system combining legumes with fruit trees, permanent soil cover from crop residues, and contour ploughing. After three years, nitrogen fertilizer inputs have been reduced by 40% compared to conventional monoculture. Which of the following best explains this reduction in nitrogen fertilizer requirement?
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