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IB Biology HL 4.2.7 Agriculture sustainability factors Question Bank

Practise IB Biology SL/HL 4.2.7 by applying agriculture sustainability factors concepts to exam-style questions.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • identify the relevant biological structure, process or evidence
  • apply the correct biological mechanism to the question
  • evaluate the result using data, adaptation or ecological reasoning

D4.2.7—Agriculture sustainability factors question 1

[Maximum number: 2]

The predominant source of phosphorus is rock containing phosphate (phosphate rock). The graph below shows the world production between 1900 and 2009.

Figure for Question D4.2.7—Agriculture sustainability factors question 1 — IB Biology HL

Some scientists estimate that available phosphorus reserves in the Earth will be completely depleted within approximately 100 years. Discuss the implications of these estimates.

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