Note from Mr. W: Our Unit 8 tutorials have been updated to align with the College Board’s 2025 AP Bio Course and Exam Description.
Unit 8 Contents
- Topic 8.1: Responses to the Environment/Animal Behavior
- Topic 8.2: Energy Flow Through Ecosystems
- Topics 8.3 – 8.5: Population Growth and Community Ecology
- Topics 8.6 – 8.7: Biodiversity and Disruptions to Ecosystems
- Unit 8 Cumulative Objectives, Flashcards, and Quizzes
1. Topic 8.1: Responses to the Environment /Animal Behavior
Animal Behavior Student Learning Guide
2. Topic 8.2: Energy Flow through Ecosystems
Topic 8.2, Energy Flow through Ecosystems, Student Learning Guide (updated)
-
-
Topic 8.2, Part 1: Energy Use in Organisms
-
Topic 8.2, Part 2: The Carbon Cycle
-
Topic 8.2, Part 3: The Nitrogen Cycle (new for 2025-26)
-
Topic 8.2, Part 4: The Water Cycle (new for 2025-26)
-
Topic 8.2, Part 5: The Phosphorus cycle (new for 2025-26)
-
Topic 8.2, Part 6: Food Chains and Food Webs
-
Topic 8.2, Part 7: Trophic Levels
-
3. Topics 8.3 – 8.5: Population Growth and Community Ecology
Population Growth and Community Ecology Student Learning Guide (updated)
Ecological Succession is not mentioned in the College Board’s 2025 AP Course and Exam Description, and we’ve demoted it to an optional topic. You can access it at the preceding link.
4. Topics 8.6 – 8.7: Biodiversity and Disruptions to Ecosystems
Biodiversity and Disruptions to Ecosystems Student Learning Guide (updated)
-
-
Topic 8.6: Biodiversity
-
Topic 8.7, Disruptions to Ecosystems Part 1: Habitat Destruction and Fragmentation
-
Topic 8.7, Disruptions to Ecosystems, Part 2: Overharvest, Overhunting, and Invasive Species
-
Topic 8.7, Disruption to Ecosystems, Part 3: Eutrophication and Biomagnification (new for 2025-26)
-
Topic 8.7, Disruption to Ecosystems, Part 4: What Can be Done?
-