chapters 1-4 - minor

chapters 1-4 - minor - Biology 1001 Case Study Life on...

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Biology 1001 Case Study: Life on Earth—and Elsewhere? 1. All events can be attributed to related cause a. Don’t evoke deity b. Do not specifically exclude deity 2. Natural law apply at all places and all times 3. People perceive events in similar ways The Scientific Method Observation-- something unexpected happens Hypothesis – exploration of the prediction Experiment – Controlled test, challenge prediction Conclusion – supports or doesn’t support hypothesis *doesn’t work -> Modify Hypothesis *Figure E1-1 page 10* Fleming 1920 created Penicillin Scientific Theories General statements about how thing operate Derived through inductive reasoning Based on many observations that support the theory Has survived through challenges Never permanent or final “truth” o Always provisional or tentative o Always subject to change or replacement Used to propose hypothesis about specific experiments (deductive Reasoning) Question: A Hypothesis is a testable proposal that explains an observed event 1.1 What Are the Characteristics of Living Things? Living Things Are Both Complex and Organized Living Things Respond to Stimuli Living Things Maintain Relatively Constant Internal Conditions Through Homeostasis Living Things Acquire and Use Materials and Energy Living Things Grow Living Things Reproduce Themselves DNA Is the Molecule of Heredity Living Things As a Whole Have the Capacity to Evolve *figure 1-2 page 3* 1. Cell – is the smallest unit of life 2. Genes – units of heredity that provide the information needed to control the life of the cell
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3. Organelles – sub cellular structures: miniature chemical factories that use the information in the genes and keep the cell alive 4. Plasma membrane – a thin sheet surrounding the cell that both encloses the cytoplasm and separates the cell from the outside world. 5. Cytoplasm – watery medium surrounding them 6. Tissues – perform a particular function 7. Organ – various types of tissue types combine to form a structural unit 8. Organ system – a group of several organs that collectively perform a single function 9. Organism – an individual living thing 10. Species – a group of very similar, potentially interbreeding organisms 11. Population – members of the same species that live in a given area. 12. Community – populations of several species living and interacting in the same area 13. Ecosystem –a community and its nonliving environment 14. Biosphere –the surface region of the earth 15. Homeostasis – to stay the same 16. Metabolism – the sum total of all of the chemical reactions needed to sustain an organism’s life 17. Energy – the ability to do work 18. Photosynthesis – a process in which organisms capture the energy of sunlight and store it in energy rich sugar molecules 19. Deoxyribonucleic acid or DNA – hereditary information within a molecule 20. Mutations – occasional errors 21. Evolutions - states that modern organisms descended –with modification- from
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chapters 1-4 - minor - Biology 1001 Case Study Life on...

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