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IB ESS HL 3.1.7 Species Diversity Components Questions

Interpret species richness and evenness as components of species diversity.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • define species diversity using species richness and relative abundance or evenness
  • quantitatively compare biodiversity between ecosystems or historical and restored conditions
  • evaluate how invasive species or habitat change alters richness, evenness, genetic diversity and overall biodiversity

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Study 3.1.7—Species diversity components conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS HL 3.1.7 Species Diversity Components Questions question 1

[Maximum number: 2]
Figure: Four species of the family Leporidae

Figure:Four species of the family Leporidae

Figure: A dichotomous key for species A to D

Figure:A dichotomous key for species A to D

Figure: Sagebrush ecosystem without invasive cheatgrass

Figure:Sagebrush ecosystem without invasive cheatgrass

Figure: Sagebrush ecosystem with invasive cheatgrass

Figure:Sagebrush ecosystem with invasive cheatgrass

The family Leporidae includes hares and rabbits. The figures show four species that can be found in western North America.

Distinguish between the biodiversity of the sagebrush ecosystems in

Figures: Sagebrush ecosystem without invasive cheatgrass and Sagebrush ecosystem with invasive cheatgrass.

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