230_012611 - Biol 230: Class #2, Wednesday, January 26,...

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Biol 230: Class #2, Wednesday, January 26, 2011 Agenda Welcome and agenda Reminder: iClickers to be used starting next week – see syllabus Activity: What is Life? Lecture: Water and Carbon: the Building Blocks of Life
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Use evidence Ask questions Be skeptical Cultivate wonder Identify confusions Think like a biologist How do I get engaged in the study of biology?
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Big Idea: Cell theory Living things are defined in biology as those things made up of one or more cells Cells are the basic building blocks of all living things (organisms). A cell is the simplest collection of matter (atoms and molecules) currently considered to be alive.
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Omne vivum ex vivo All life (is) from life
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Assignment Write a short essay on “omne vivum ex vivo” (all life is from life) ~150 words - ?? (you decide) What are its implications to you? There’s no correct answer – I just want your ideas1 Due at the beginning of Class on Friday!
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Water and Carbon: The building blocks of life Outline Jan 26, 2011 Chapter 3: Water Properties of Water Acids and Bases, pH Expansion upon freezing Chapter 4: Carbon •. Carbon cycle •. Carbon-based macromolecules
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Fig. 3-1 Chapter 3: Water and the Fitness of the environment Water is the substance that makes life possible.
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Fig. 3-2 Hydrogen bond H + H O + + + Water molecule: Polar - interacts with other water molecules via H bonds
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Fig. 3-UN1 4 Properties of Water 1. Cohesion 2. Moderates Temperature 3. Expansion upon freezing 4. Solvent
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Fig. 3-3 Water-conducting cells Adhesion to the cell wall Cohesion between water molecules 150 µm Direction of water movement 1. Cohesion Cohesion allows water to be transported from the roots to the leaves against the forces of gravity.
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Fig. 3-5 San Diego 72° 40 miles Pacific Ocean 70s (°F ) 80s 90s 100s Santa Barbara 73°
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This note was uploaded on 11/28/2011 for the course BIOL 230 taught by Professor J.breckler during the Spring '11 term at S.F. State.

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230_012611 - Biol 230: Class #2, Wednesday, January 26,...

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