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IB Biology HL A4.2.6 Causes of Biodiversity Crisis Questions

Identify major human pressures, and for HL, explain how invasive alien species disrupt native biodiversity.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify human drivers such as urbanization, land clearance, agriculture, pollution and overexploitation as causes of biodiversity loss.
  • Describe how a named invasive alien species can outcompete or disrupt native species and contribute to biodiversity loss.

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Study A4.2.6—Causes of biodiversity crisis conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL A4.2.6 Causes of Biodiversity Crisis Questions question 1

[Maximum number: 1]

The graph shows the change in forest area in Greater Mekong countries in Southeast Asia between 1973 and 2009. This was mainly due to deforestation.

Figure for Question IB Biology HL A4.2.6 Causes of Biodiversity Crisis Questions question 1 — IB Biology HL

State one cause of the current biodiversity crisis, other than deforestation.

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