Is It Alive? The 8 Rules That Define Life

🌱 The eight characteristics of living things in biology are: being made of cells, growth and development, reproduction, movement, energy use, respiration, waste excretion, and response to stimuli. An organism must demonstrate all eight to be considered living. In AP Biology, this concept supports foundational understanding for Units 1 and 2, especially when distinguishing living systems from nonliving matter and analyzing biological organization. In this video, you’ll learn how these characteristics connect to cell theory, metabolism, energy transfer (ATP), and homeostasis—key ideas that appear in multiple-choice questions and introductory FRQs. This supports Skill 1 (Concept Explanation) and Skill 6 (Argumentation). ⏰Timestamps: 00:00 What are the eight characteristics of living things? 00:40 How are living things classified into six kingdoms? 02:00 Characteristic 1: Made of cells 02:45 Characteristic 2: Growth and development 03:15 Characteristic 3: Movement 03:55 Characteristic 4: Reproduction (sexual and asexual) 04:45 Characteristic 5: Energy use and ATP 05:40 Characteristic 6: Respiration 06:10 Characteristic 7: Waste excretion 06:40 Characteristic 8: Response to stimuli 👍 Like the video, 💬 Share your thoughts, and 🔔 Subscribe for weekly AP Bio lessons! 📘 Watch the full Cell Biology playlist here:    • Cell Biology with Ms. Parrott   🦠Cells: The Building Blocks of Life:    • Your Body's Tiny Factories!   🛒 Explore classroom resources: TPT store link: https://www.teacherspayteachers.com/s... 💡 All of my lessons are free here on YouTube, but if you’d like to support future videos and classroom resources, you can ☕ Buy Me a Coffee buymeacoffee.com/msparrottscience. Every little bit helps me keep creating high-quality AP Bio lessons for students and teachers! 🌱 FAQs What are the 6 Kingdoms of Living Things? Bacteria – Prokaryotic, unicellular Archaea – Prokaryotic, unicellular (often extremophiles) Protista – Mostly unicellular eukaryotes Fungi – Includes molds, yeasts, mushrooms Plantae – Mosses, ferns, gymnosperms, angiosperms Animalia – From corals to mammals All organisms in these kingdoms share the eight characteristics of life. What does “made of cells” mean in AP Biology? All living organisms are composed of one or more cells, the basic unit of life. What does growth mean in AP Biology? Growth refers to an increase in size, cell number, or developmental complexity. What does reproduction mean in AP Biology? Reproduction is the ability to produce offspring either sexually or asexually. What does responding to stimuli mean on the AP Biology exam? It means an organism can detect and react to environmental changes. How do you determine if something is alive on an AP Biology question? Check whether it fulfills all eight characteristics of life. How does energy use show up in AP Biology questions? Energy transformation (light → glucose → ATP) connects to photosynthesis, cellular respiration, and metabolism.