**UPDATES COMING SUMMER 2026**
Unit 4.1 Interactive Notes | Answer Key
Signal Transduction Pathways Graphic Notes | Answer Key
Unit 4.1 Topic 1: Signal Reception
Unit 4.1 Topic 2: Signal Transduction & Cellular Response
Unit 4.1 Topic 3: Distances of Cell Communication
Unit 4.1 Topic 4: Homeostasis & Feedback Mechanisms
Unit 4.2 Interactive Notes | Answer Key
Cell Cycle Graphic Notes | Answer Key
Unit 4.2 Topic 1: The Cell Cycle
Unit 4.2 Topic 2: Cell Cycle Control System