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Chapter 1: Study of Life

by: Siân L'Roy

Chapter 1: Study of Life Biol 1406

Siân L'Roy

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About this Document

This chapter discusses the basics of the field of general biology. It also discusses the process of the Scientific Method.
General Biology
Shahdi Jalivand
Class Notes




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This 3 page Class Notes was uploaded by Siân L'Roy on Sunday September 4, 2016. The Class Notes belongs to Biol 1406 at Tarrant County College District taught by Shahdi Jalivand in Fall 2016. Since its upload, it has received 43 views. For similar materials see General Biology in Biology at Tarrant County College District.


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Date Created: 09/04/16
Chapter 1: Study of Life What is Biology?  Biology o Bios= Life o Ology= The study of  What is “Life”?  Ability to: 1. Reproduce (including growth) *Note: Growth/development and reproduction often takes place at different times  in the life cycle. 2. Metabolize (Utilize Energy) 3. Respond to its environment ** All living things are composed of cells Biology  Subdisciplines o Microbiology o Zoology o Botany o Physiology o Anatomy o Mycology o Epidemiology o Immunology o Virology o Marine Biology How do Biologists approach situations/questions? Scientific Method 1. Observation: Both of the current investigator and those of others. 2. Formulate a Hypothesis a. A Hypothesis i. An educated guess ii. A tentative answer to a question iii. A possible explanation for an observed phenomenon  3. Make Predictions a. If… then i. What you expect to happen if the hypothesis is correct. 4. Test the Hypothesis Chapter 1: Study of Life a. Experiment (controlled) 5. Generate Conclusions a. Analyze the results A Good Hypothesis Must: 1. Be a possible explanation for an observed phenomenon 2. Reflect past experiments with similar questions 3. Be testable and falsifiable Eg: Testable­ Able to be tested in a controlled environment Is God Real? Falsifiable­ able to be proven wrong                        Time Travel **Note: A hypothesis can be disproven but never proven conclusively A Good Experiment Must 1. Be repeatable 2. Include controls a. Placebos b. Control groups Eg: birth control 3. Have a few variables as possible. a. Change one thing at a time. 4. Have a large enough study group to be statistically valid Eg: coin toss Diabetes Study: Conducted by the National Institutes of Health 1. Know (observations) a. Insulin dependent diabetes has a genetic component b. Insulin making cells come under attack by the body’s immune system c. These cells are more likely to be attacked the more they are utilized 2. Hypothesis: What if we give at­risk children low doses of insulin PRIOR to their  becoming a diabetic? Chapter 1: Study of Life 3. Would we (predictions): a. Reduce the numbers of children who become diabetic? b. Delay the onset of the disease? 4. Test: a. Group 1: Low doses of insulin daily, blood sugar is monitored b. Group 2: No insulin, blood sugar is monitored 5. Analyze: Both groups watched for several years, compared the rate of the development of diabetes. 6. Conclusions: Onset of the disease was not decreased


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