1. Welcome to Biology 101 Course goals Course information Text Grading

2. Contemporary Topics in Biology Population Growth Smoking Cancer AIDS Environment Energy

3. Outline What is biology Hierarchy of Life Properties of Living Organisms Scientific Method

4. What is Biology? Study of life Search for order in the natural world Discovery of new relationships Learn working rules that allow life to exist

5. Life Levels of Organization 1.Among organisms 2.Within Organisms 3.Within Cells

6. Life Levels of Organization Among Organisms 1.Biosphere 2.Ecosystem 3.Community 4.Population

7. Life Levels of Organization Within Organisms 1.Organ systems 2.Organs 3.Tissues 4.Cells

8. Life Levels of Organization Within Cells 1.Organelles 2.Macromolecules 3.Molecules & Atoms

9. Properties of Life 1.Genetic System is DNA 2. Order

10. Properties of Life 3. Homeostasis = Regulation…….. 4. Response…………………. 5. Reproduction….

11. Scientific Inquiry – How is Science Done? Discovery Science –Observing –Measuring Hypothesis-based Science –Scientific Method –Proposing & Testing hypotheses –Inductive & deductive logic

12. Hypothesis- Based Science

13. Hypothesis-based Science IF hypothesis, THEN prediction. IF inductive generalization, THEN deductive statement. Experiment  Tests the prediction/deductive statement. Experimental group  one variable independent variable  tested dependent variable  experimental outcome Control group  unchanged group/ baseline

14. Limitations of Science 1.Hypothesis can not be proven true Truth Table HypothesisPrediction True False False or True True

15. Hypotheses, Theories & Laws Hypothesis –a tentative explanation. Scientific Theory –Accepted explanation. –Supported by experimental evidence. –Pretty solid ground of science. –A well-supported hypothesis. Scientific Law –Scientific knowledge accepted as true. –An extremely well-supported hypothesis.

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