Chapter 1 Introduction 2011

Chapter 1 Introduction 2011 - Bl 104 Principles of Biology...

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Unformatted text preview: Bl 104 Principles of Biology I -2011 Dr. Nevin Aspinwall iology is Fun. True False Chapter 1 Introduction to Biology 1. Introduction to the Textbook 2. What is Life? 3. Characteristics of Living Organisms 1. Specific Organization 2. Sensitivity, Irritability, or Response to Stimulation 3. Ability to Reproduce 4. Possess DNA or RNA as Genetic Material 5. Growth and Development 6. Energy Utilization 7. Homeostasis 8. Evolutionary Adaptation nifying Themes of Biology 1. Cell Theory 2. Molecular Basis of Inheritance Explains the Continuity of Life 3. The Diversity of Life Arises by Evolutionary Changes 4. Evolutionary Conservation Explains the Unity of Living Systems 5. Living Systems Exist in a Non-Equilibrium State What is Science? Science is a system of acquiring knowledge based upon the scientific method and the organized body of knowledge gained by using the scientific method. Goal of Science: To produce useful models of knowledge. Three Levels of Certainty about our Knowledge 1. Hypothesis- 2. Theories- 3. Physical Laws or Laws of Nature- Some Generalizations About Science 1. All levels of certainty can be disproven or falsified. 2. Science can probably never produce absolute eternal truths. We have to be satisfied with partial truths which may change. The Scientific Method earning Objectives . To understand the four steps of the scientific method. . To understand the kinds of data generated by experiments. . To understand how data generated by experiments is analyzed statistically. . How has much of the Scientific nowledge been accumulated? . Four Steps of the Scientific Method 1. Observation 2. Defining the Problem . Erecting the Hypothesis xperimental Design . Number of variables . Control and Experimental Groups . Uncontrolled Variables . The Null Hypothesis . The Truth Table esting the Hypothesis-Experimentation If.Then.. statements n Example of Employing the Scientific Method- bservation efining the Problem recting the Hypothesis xperimentation- Testing the Hypothesis The Effect of Resveratrol on the Lifespan of Animals bservations: 1. All animals have finite lifespans. These lifespans vary with species. 2. A species lifespan appears to be genetically controlled. Medicine hasnt really increased the human lifespan very much although more people approach this lifespan. 3. We humans would like to live forever and thus we have searched for the fountain of youth. 4. Some nutritional supplements have claimed to increase lifespan in humans. Is there are any scientific evidence for this. NO! It is difficult to experiment on humans because we have such a long lifespan and because of ethical issues....
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Chapter 1 Introduction 2011 - Bl 104 Principles of Biology...

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