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What is life?

What is life?. How can we define it?. How can we define it?. Growth Reproduce Homeostasis Response to stimuli Metabolism The set of chemical reactions that happen in living organisms in order to maintain life. The chemical reactions that maintain life:. By the end of today you will…

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What is life?

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  1. What is life? • How can we define it?

  2. How can we define it? • Growth • Reproduce • Homeostasis • Response to stimuli • Metabolism The set of chemical reactions that happen in living organisms in order to maintain life

  3. The chemical reactions that maintain life: By the end of today you will… • Understand these chemical reactions • Know why and where these chemical reactions occur • Have observed these reactions through experimentation • Be able to list several factors that effect these reactions

  4. What do living things need? Plants Animals

  5. Why? • Respiration sugar + oxygenwater + energy + carbon dioxide • What do organisms use energy for? • Growth, reproduction, maintaining homeostasis To Live!! • Photosynthesis water+sunlight + Carbon dioxide sugar + oxygen

  6. Elodia Observation • Genus of aquatic plants • Live entirely under water Photosynthesis • Q: what is the effect of light intensity on the rate of photosynthesis?

  7. Yeast Experiment • Unicellular fungi • eukaryote • 1,500 species

  8. Yeast Experiment • Respiration • Q: What is the effect of sugar concentration on respiration? • 5 sugar concentrations: • 0% • 0.5% • 1% • 4% • 10%

  9. Example ways to plot your data… • For the x axis: choose either time or sugar concentration • For the y axis: choose either bubble height or balloon circumference

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