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Introduction to Biology

Introduction to Biology. Ch. 1 pgs. 16-22. What is Biology. Bio- the Greek word bios means life -ology- means the study of ….so Biology is the study of life!!!!. What makes something living?. In your rows work together to develop a list at least 3 of living things.

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Introduction to Biology

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  1. Introduction to Biology Ch. 1 pgs. 16-22

  2. What is Biology • Bio- the Greek word bios means life • -ology- means the study of ….so Biology is the study of life!!!!

  3. What makes something living? • In your rows work together to develop a list at least 3 of living things. • Once you come up with a list of living things develop a list of the characteristics define them as living. • Pick the 5 best characteristics and we will develop a class list of the characteristics of living things.

  4. Characteristics of Living Things • All living things are made up of units called cells. • Can be unicellular or multicellular • Reproduce • Can be asexual or sexual • Based on a universal genetic code • Grow and develop • Obtain and use materials and energy • Go through a process called metabolism to break down food for energy.

  5. Characteristics of living things • Respond to their environment • Use senses to respond to stimulus from the environment. • Maintain an internal balance • Use the process of homeostasis to maintain the balance using internal feedback mechanisms. • Ex- temperature control- what do you do when you get too cold? Too hot? • Living things change or evolve over time

  6. What is the ScientificMethod? • It is the steps someone takes to identify a question, develop a hypothesis, design and carry out steps or procedures to test the hypothesis, and document observations and findings to share with someone else. • In other words, it’s a way to solve a problem.

  7. The steps of the Scientific Method are: • State the Problem • Research/Gather Info. • Form a Hypothesis • Perform an Experiment • Gather Data/Info. • Analyze Data/Observations • Form a Conclusion

  8. Control Group • The group to which no changes are made. The control group is the standard to compare all the others to. • A controlled experiment has a control group!

  9. Independent Variable(Manipulated Variable) • The variable that you, as the experimenter, changes. You have control over this variable.

  10. Dependent Variable(Responding Variable) • The variable that the experimenter has no control or power over.

  11. Example: • We are going to run an experiment to see the effect that fertilizer has on the height of plants. We measure the heights of 4 plants over a month.

  12. In the first plant we add 10 grams of fertilizer. • In the second plant, we add 20 grams of fertilizer. • In the third plant, we add 30 grams of fertilizer. • We add none to the fourth.

  13. Questions: • Which plant was the control group? • The fourth plant, because no fertilizer was added.

  14. What was the independent variable? • The amount of fertilizer because you changed the amount added.

  15. What was the dependent variable? • The amount the plant grew, because you have no control over that!

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