The Living World: Biodiversity
APES Unit 2 Quiz
Test biodiversity, ecosystem services, island biogeography and succession with free practice questions and explanations.
Directions: Select the best answer, then choose Check Answer for an explanation. Mark questions for review or cross out options as you practise.
Your selection results
| Topic | Correct | Answered | Total |
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What is covered in the APES Unit 2 quiz?
Practise biodiversity, ecosystem services, island biogeography, ecological tolerance, natural disruptions, adaptations and succession. Select a topic for focused questions with hints and explanations.
- 2.1 Introduction to Biodiversity (8 questions)
- 2.2 Ecosystem Services (8 questions)
- 2.3 Island Biogeography (8 questions)
- 2.4 Ecological Tolerance (8 questions)
- 2.5 Natural Disruptions to Ecosystems (7 questions)
- 2.6 Adaptations (8 questions)
- 2.7 Ecological Succession (8 questions)
Unit 2 has a published 6–8% weighting in the multiple-choice section. Use this biodiversity practice test alongside revision of the other eight AP Environmental Science units.
How to use this biodiversity practice quiz
- Answer before checking.Choose an option, then press Check Answer to record it. Use a hint when you need one; hint use is noted in your results.
- Explain the reasoning.Read the explanation after each answer. For data questions, compare the evidence and check what it can support. For calculations, use the supplied model and units.
- Revisit weak topics.Review missed answers or questions marked for review. Retry the selection for a fresh attempt, then apply the ideas to new graphs and written questions.
Concept check: Separate species richness from evenness, island size from isolation, and primary succession from recovery where soil remains. Avoid conclusions stronger than the evidence supports.
APES Unit 2 quiz FAQs
What does the APES Unit 2 quiz cover?
The quiz has 55 multiple-choice practice questions across all seven Unit 2 topics: biodiversity, ecosystem services, island biogeography, ecological tolerance, natural disruptions, adaptations and ecological succession. Questions include hypothetical data tables, applied scenarios and calculations with supplied assumptions.
How much of the AP Environmental Science exam is Unit 2?
College Board assigns Unit 2: The Living World: Biodiversity a 6–8% weighting in the multiple-choice section. This independent practice quiz is not an official College Board exam.
How do species richness and evenness differ?
Species richness is the number of species in a community. Evenness describes how similar their relative abundances are. Two communities can have equal richness but different evenness.
Can I see explanations and retry missed questions?
Each recorded answer reveals the correct option and explanation. View results to review missed questions, then use Retry this selection to clear those answers and start a new attempt. Questions marked for review create a separate study set. You can eliminate and restore choices before checking an answer.
How is the quiz score calculated?
Each correct answer earns one point. Answered accuracy uses only answered questions; the selection score uses all questions in that selection, including unanswered ones. Hints are counted separately without a points penalty. The score does not predict an AP grade.
Does my quiz progress save?
Answers, review marks, hints and timer progress save in this browser when local storage is available. They do not sync across devices. The optional 60-second practice timer pauses when this tab is hidden; it is not official exam timing.