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IB ESS HL 2.1.29 Life Cycles and r/K Strategies Question Bank

Compare r-selected and K-selected strategies using reproductive output, survival and community stability.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • define the HL ecological concept precisely
  • compare potential and actual conditions or reproductive strategies
  • apply evidence from competition, adaptation or life-history traits

2.1.29 (HL)—Life cycles and r/K strategies question 1

[Maximum number: 3]

Question (a)

(a)

Draw a sketch graph showing a typical survivorship curve for a "K-strategist" species.

[ 2 ]

Question (b)

(b)

Outline one reason for the shape of the curve from part 3(a)(i) above.

Part 3(a)(i) asks for a typical survivorship curve for a K-strategist species. Use that curve when explaining its shape.

[ 1 ]
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