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Understanding the Essential Properties of Life: Characteristics that Define Living Organisms

Life is characterized by several essential properties that distinguish living organisms from non-living matter. These include the ability to respond to internal and environmental stimuli, develop and reproduce, take in and process nutrients, maintain homeostasis, adapt and evolve over time, and contain genetically encoded information (DNA/RNA). All forms of life, whether single-celled or multicellular, exhibit these fundamental characteristics that enable them to thrive in various environments.

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Understanding the Essential Properties of Life: Characteristics that Define Living Organisms

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  1. What is Life? and how do we know?

  2. www.wikipedia.com

  3. Properties of Life • Respond to internal and environmental stimuli

  4. Properties of Life • Develop and Reproduce http://www.infovisual.info/02/013_en.html

  5. Properties of Life Take in and processnutrients from the environment http://images.google.com/images?q=tbn:7YjrbLLj0tAJ:www.kentlaw.edu/academics/clinic/tax/images/eat.jpg

  6. Properties of Life • Have the ability to maintain homeostasis within their internal environment (within limits) http://www.ma-strasbourg.justice.fr/images/balance.gif

  7. Properties of Life • Have the ability to adapt and change over time (evolve) http://organicmeat.net/barefoot/evolve.gif

  8. Properties of Life • Contain genetically encoded information blueprinting the organism (DNA/RNA) “common molecular inheritance “ http://images.google.com/imgres?imgurl=http://www.wired.com/news/images/full/1alba_f.jpg&imgrefurl=http://www.wired.com/news/gallery/0,2072,50830-3274~3273,00.html&h=375&w=500&sz=31&tbnid=d_XqmOIAZu8J:&tbnh=95&tbnw=127&hl=en&start=1&prev=/images%3Fq%3Ddna%2Bequals%26svnum%3D50%26hl%3Den%26lr%3D%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official_s%26sa%3DG

  9. Properties of Life • Life is composed of a single cell or multiple cells http://www.cnas.missouristate.edu/labimages/Biology/Bio122/images/Week%208%20Images/Liver%20cells.JPG http://images.google.com/imgres?imgurl=http://www.cnas.smsu.edu/labimages/Biology/Bio122/images/Week%25208%2520Images/Liver%2520cells.JPG&imgrefurl=http://www.cnas.smsu.edu/labimages/Biology/Bio122/week8.htm&h=480&w=640&sz=77&tbnid=akulHWxCMq8J:&tbnh=101&tbnw=135&hl=en&start=22&prev=/images%3Fq%3Dcells%26start%3D20%26svnum%3D50%26hl%3Den%26lr%3D%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official_s%26sa%3DN http://images.google.com/imgres?imgurl=http://extension.oregonstate.edu/fcd/nutrition/ewfl/module2/images/bacteria.jpg&imgrefurl=http://extension.oregonstate.edu/fcd/nutrition/ewfl/module2/food1.html&h=219&w=281&sz=6&tbnid=N26okpA61kYJ:&tbnh=84&tbnw=109&hl=en&start=56&prev=/images%3Fq%3Dbacteria%26start%3D40%26svnum%3D50%26hl%3Den%26lr%3D%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official_s%26sa%3DN

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