--- title: "Unit 2 – The Living World: Biodiversity - AP Environmental Science" description: "Review Unit 2 – The Living World: Biodiversity for AP Environmental Science with Fiveable study guides and practice resources." canonical: "https://fiveable.me/ap-enviro/unit-2" type: "unit" subject: "AP Environmental Science" unit: "Unit 2 – The Living World: Biodiversity" --- # Unit 2 – The Living World: Biodiversity - AP Environmental Science ## Overview Review Unit 2 – The Living World: Biodiversity for AP Environmental Science with Fiveable study guides and practice resources. ## Study Guides - [2.6 Adaptations](/ap-enviro/unit-2/adaptations/study-guide/NHy6ed9wummAeB8F0UDq) - [2.2 Ecosystem Services](/ap-enviro/unit-2/ecosystem-services/study-guide/ar6VaapmuP8HSgvCJrvA) - [2.3 Island Biogeography](/ap-enviro/unit-2/island-biogeography/study-guide/bRMemtdNYzWXmblCACF9) - [2.4 Ecological Tolerance](/ap-enviro/unit-2/ecological-tolerance/study-guide/dLeq5qqhYeCboAOsuBiz) - [2.7 Ecological Succession](/ap-enviro/unit-2/ecological-succession/study-guide/9nK9VTaGMUhfWvoRySDr) - [2.5 Natural Disruptions to Ecosystems](/ap-enviro/unit-2/natural-disruptions-ecosystems/study-guide/QpHtIjQYZUMm1mTZghkU) - [2.1 Introduction to Biodiversity](/ap-enviro/unit-2/intro-biodiversity/study-guide/c77aT0cHPSCwPKS87s5o) ## FAQs ### What topics are covered in APES Unit 2? APES Unit 2: The Living World: Biodiversity covers 7 topics: Introduction to Biodiversity, Ecosystem Services, Island Biogeography, Ecological Tolerance, Natural Disruptions to Ecosystems, Adaptations, and Ecological Succession. Together they explain how biodiversity supports ecosystems and how species respond to change over time. See the full topic list at [/ap-enviro/unit-2](/ap-enviro/unit-2). ### How much of the APES exam is Unit 2? APES Unit 2 makes up 6-8% of the AP exam. That weight covers biodiversity concepts including ecosystem services, island biogeography, ecological tolerance, adaptations, and ecological succession. It's a smaller unit by percentage, but its concepts show up in larger ecosystem questions throughout the exam. ### What's on the APES Unit 2 progress check (MCQ and FRQ)? The APES Unit 2 progress check includes both MCQ and FRQ parts drawn from all 7 topics in the unit. MCQ questions test your understanding of biodiversity types, ecosystem services, island biogeography, and ecological tolerance. The FRQ portion asks you to explain concepts like ecological succession and how natural disruptions affect species composition. Practice with matched questions at [/ap-enviro/unit-2](/ap-enviro/unit-2). ### How do I practice APES Unit 2 FRQs? APES Unit 2 FRQs most often pull from ecological succession, ecosystem services, and island biogeography. These questions typically ask you to explain a process, identify a cause-and-effect relationship, or propose a solution using biodiversity concepts. To practice, write out full responses using specific vocabulary like pioneer species, species richness, and habitat diversity, then check your reasoning against the scoring criteria. Find practice FRQs at [/ap-enviro/unit-2](/ap-enviro/unit-2). ### Where can I find APES Unit 2 practice questions? The best place to find APES Unit 2 practice questions, including multiple-choice and practice test sets, is [/ap-enviro/unit-2](/ap-enviro/unit-2). You'll find MCQs covering biodiversity, ecosystem services, island biogeography, and ecological succession, all matched to the 6-8% exam weight this unit carries. ### How should I study APES Unit 2? Start with the big picture: biodiversity means genetic, species, and habitat diversity, and every topic in this unit connects back to why that variety matters. Work through the 7 topics in order since they build on each other. For ecological succession, sketch out primary vs. secondary succession with real examples. For island biogeography, practice drawing the species-area relationship. For ecosystem services, memorize the four categories (provisioning, regulating, cultural, supporting) with one concrete example each. Then test yourself with MCQs and write out at least one FRQ response on ecological succession before exam day. Get study resources at [/ap-enviro/unit-2](/ap-enviro/unit-2). ## Structured Data ```json {"@context":"https://schema.org","@type":"FAQPage","inLanguage":"en","mainEntity":[{"@type":"Question","@id":"https://fiveable.me/ap-enviro/unit-2#what-topics-are-covered-in-apes-unit-2","name":"What topics are covered in APES Unit 2?","acceptedAnswer":{"@type":"Answer","text":"APES Unit 2: The Living World: Biodiversity covers 7 topics: Introduction to Biodiversity, Ecosystem Services, Island Biogeography, Ecological Tolerance, Natural Disruptions to Ecosystems, Adaptations, and Ecological Succession. Together they explain how biodiversity supports ecosystems and how species respond to change over time. See the full topic list at /ap-enviro/unit-2."}},{"@type":"Question","@id":"https://fiveable.me/ap-enviro/unit-2#how-much-of-the-apes-exam-is-unit-2","name":"How much of the APES exam is Unit 2?","acceptedAnswer":{"@type":"Answer","text":"APES Unit 2 makes up 6-8% of the AP exam. 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