ch. 3&4 questions

ch. 3&4 questions - Jackie Daa Biology 1151 Lab Day...

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Jackie Daa Biology 1151 Lab Day Thursday Robinson 1. Water contributes to support life and the fitness of the environment through cohesion in reaching plants, moderating temperature, stabilize through its specific heat, evaporative cooling, and insulating large bodies of water by floating ice. 2. Water molecules simply have 2 hydrogen atoms joined to the oxygen atom by single covalent bonds. Because oxygen is more electronegative than hydrogen, the electrons of the polar bonds seem to stay a lot closer to the oxygen atom, thus makes water a polar molecule. Other water molecules are joined close together via hydrogen bonds, which is why water is cohesive. 3. Since hydrogen atoms are placed outside of the oxygen atoms, it is easier for other hydrogen atoms on other water molecules to bond together in multiple partners/associations. 4. Cohesion is so important because due to the hydrogen bonding, it contributes to the transport of water and dissolved nutrients against gravity in plants. So, water is able to travel upward and several other
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This note was uploaded on 01/26/2010 for the course BIO 1151 taught by Professor Robinson during the Spring '09 term at College of DuPage.

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ch. 3&4 questions - Jackie Daa Biology 1151 Lab Day...

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