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AP Biology Chapter 1: Introduction to Biological Concepts and Research. 1.1 Characteristics of Living Organisms. “Biology” is the study of living organisms – easier to recognize than to define Characteristics present in all living things
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AP Biology Chapter 1: Introduction to Biological Concepts and Research
1.1 Characteristics of Living Organisms • “Biology” is the study of living organisms – easier to recognize than to define • Characteristics present in all living things • “living thing” = “Organism”; living organism is really redundant • Hierarchy/ Organization • Emergent Properties • Cells • Chemical Instructions (DNA, enzymes, hormones) - - - related to structure and function • Metabolism • Energy Flows/ Matter Cycles • Homeostasis • Reproduction (growth, development, senescence) • Populations Evolve
Living Organisms Bacteria one cell/ prokaryotic; variety Protista one cell or colony/ eukaryotic; variety Fungi one cell or many/ eukaryotic; chitin cell wall and heterotrophic Plantae multicellular/ eukaryotic; cellulose cell wall and photosynthetic. Has tissues Animalia multicellular/ eukaryotic; no cell wall, heterotrophic and tissues with nerve and muscle Where do VIRUSES fit …. Living or nonliving?
Study Break 1.1 (pg 6) 1. List major levels of hierarchy of life, identify one emergent property at each level. 2. What do living organisms do with the energy they collect from the environment? 3. What is a life cycle?
1.2 Biological Evolution * Big Idea #1 • Given that organisms/ populations have changes in DNA • Populations change through time • Current organisms had historic ancestors • Diversity … Idea of Unity and Diversity • Wallace and Darwin explain HOW changes can occur. • Natural Selection • Changes to genes; mutations are raw material of evolution • Adaptations maintain favorable mutations • Artificial Selection • Domestication, cross breeding …. Genetic engineering
Study Break 1.2 (pg 8) 1. What is the difference between artificial selection and natural selection? 2. How do random changes in the structure of DNA affect the characteristics of organisms? 3. What is the usefulness of being camouflaged in natural environments?
HW Questions for Chapter 1 Answer as a complete sentence – this will become your study guide…a “Study guide” that will guide you in what to study The goal is to think about what you read, heard in class, got in notes and discussed or applied in labs – These answers will NOT be posted, but you are welcome to ask for clarification or direction from your teacher. And while you are encouraged to collaborate, YOUR answers must be YOUR OWN words and show understanding. May be typed, hand written (legibly) or submitted electronically. Assigned: ___________ Due: __________ Worth: 25 points 1.1 page 6 #1,2,3 1.2 page 8 #1,2,3 page 10 Thinking like a scientist 1.3 page 12 #1,2 page 16 Thinking like a scientist page 17 Thinking like a scientist 1.4 page 19 #1,2,3,4 Conclusion page 21 Discuss the Concepts #1,2, 3 Design an Experiment Interpret the Data Apply Evolutionary Thinking