Unit 3: Biodiversity, Conservation and Change
Topic 3.1: Biodiversity Questions
Practice 20 exam-style questions for IB ESS Topic 3.1. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1state1 mark
2026• vault
State what a higher value of Simpson’s Reciprocal Index (D) indicates about a community.
Markscheme and model answer locked
Unlock Question2state1 mark
2026• vault
State what is meant by 'citizen science'.
Markscheme and model answer locked
Unlock Question3identify1 mark
2026• vault
Identify one group (other than government) that can help collect biodiversity data.
Markscheme and model answer locked
Unlock Question4identify2 marks
2026• vault
Identify two groups, other than scientists, that can contribute to collecting biodiversity data.
Markscheme and model answer locked
Unlock Question5define2 marks
2026• vault
Define the term species evenness.
Markscheme and model answer locked
Unlock Question6define2 marks
2026• vault
Define the term species richness.
Markscheme and model answer locked
Unlock Question7state1 mark
2026• vault
State one reason why good biodiversity data helps conservation planning.
Markscheme and model answer locked
Unlock Question8identify1 mark
2026• vault
Identify the level of biodiversity that refers to variation within a species.
Markscheme and model answer locked
Unlock Question9state1 mark
2026• vault
State what is meant by biodiversity.
Markscheme and model answer locked
Unlock Question10define2 marks
2026• vault
Define the term species diversity.
Markscheme and model answer locked
Unlock Question11state1 mark
2026• vault
State one reason why good biodiversity data is important for conservation planning.
Markscheme and model answer locked
Unlock Question12describe2 marks
2026• vault
Describe two field methods that could be used to confirm the presence of an elusive mammal species.
Markscheme and model answer locked
Unlock Question13suggest2 marks
2026• vault
Suggest one reason why ecosystems with low biodiversity may be more likely to collapse after a disturbance.
Markscheme and model answer locked
Unlock Question14explain3 marks
2026• vault
Explain how high biodiversity can increase ecosystem resilience.
Markscheme and model answer locked
Unlock Question15outline2 marks
2026• vault
A rare mammal is suspected to live in a forest reserve. Outline two field methods that could be used to confirm its presence.
Markscheme and model answer locked
Unlock Question16explain4 marks
2026• vault
Explain how indigenous knowledge can strengthen conservation decisions.
Markscheme and model answer locked
Unlock Question17calculate3 marks
2026• vault
A sample contains 9 daisies and 1 sunflower. Calculate Simpson’s Reciprocal Index (D).
Markscheme and model answer locked
Unlock Question18suggest2 marks
2026• vault
Suggest two limitations of citizen science data when used to estimate species population size.
Markscheme and model answer locked
Unlock Question195 marks
2026• vault
The Sundarbans is the world's largest mangrove forest, located in the delta region of Bangladesh and India. Study the resource booklet figures showing the location, climate data, and biodiversity statistics for the Sundarbans region.
Markscheme and model answer locked
Unlock Question20state1 mark
2026• vault
State what is meant by environmental DNA (eDNA) sampling.
Markscheme and model answer locked
Unlock QuestionReady to practice Topic 3.1?
Get instant AI feedback on your answers, view detailed markschemes, and track your progress across all IB ESS topics.
Start Practising Now