CHAPTER 1 BIOLOGY AND THE TREE OF

CHAPTER 1 BIOLOGY AND THE TREE OF -...

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CHAPTER 1 – BIOLOGY AND THE TREE OF LIFE An Introduction Summary *What is biology? *How do scientists work? *Theory *Definition *Specific theories *Tree of Life *Taxonomy *Domains and Kingdoms Biology *What is biology? *Why should you study biology? How do Scientists Work? *Orderly, logical procedure (“Scientific Method”) *Observation *Hypothesis *Predictions and Experiments *Conclusions *Publication Scientific Method *Experimental Design *Examine one variable at the time.  *Examples: *Trains cause traffic back ups *High blood sugar causes excessive urination 1
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*Include one or more controls .   *Negative control       *Positive control     *Repeat      the experiment to verify results. *One hypothesis is found to be correct.   *The hypothesis is also found to be correct in many other situations. *The hypothesis becomes a theory . *A theory is  an explanation for a general class of phenomena or  observations .   It is the result of many scientific investigations. *Theory – 2 components 4 Unifying Themes (Theories) in Biology **Cell theory *DNA provides the molecular basis of inheritance. **Theory of evolution
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This note was uploaded on 09/08/2011 for the course BIOL 1403 taught by Professor Dini during the Fall '09 term at Texas Tech.

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CHAPTER 1 BIOLOGY AND THE TREE OF -...

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