Aliens hw 2 - Sijia Hao Astro 106 Aliens 23 February 2011...

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Sijia Hao Astro 106 – Aliens 23 February 2011 1) Carbon a. One carbon molecule essential to life is carbon dioxide, CO2. Life would be impossible without it because it provides the basis for synthesizing organic compounds that provide nutrients for plants and animals. Plants fix carbon from the atmosphere through photosynthesis to form complex molecules needed for survival, such as carbohydrates, lipids, proteins, and nucleic acids. (http://www.biocab.org/Carbon_Dioxide_CO2.html) Another molecule that incorporates carbon into life is glucose, a carbohydrate with the chemical compound C 6 H 12 O 6. It is a monosaccharide sugar produced by plants to use as energy and one of the basic building blocks of life; plants glucose it to survive, animals eat plants to survive, other animals eat those animals, and so the chain continues. ( http://www.elmhurst.edu/~chm/vchembook/540carbohydrates.html ) b. How this element was created in space long before life originated on our planet?
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This note was uploaded on 01/25/2012 for the course ASTRO 106 taught by Professor Bell during the Winter '10 term at University of Michigan.

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