AP Biology Unit 8: Ecology

Unit 8: Ecology — Comprehensive Study Guide Unit 8 zooms out from the gene to the biosphere. Selection pressures identified in Unit 7 come from the environment studied here — abiotic factors, other species, and human disturbance. This unit also unites mathematical modeling (logistic growth, carrying capacity) with case-study reasoning (keystone species, climate change). Expect ~10–15% of MCQs and an FRQ that asks you to apply ecological concepts to a realistic scenario. 💡 Exam Tip: When an AP ecology FRQ gives you a graph, find the inflection point, the asymptote, and any sudden shifts — each…