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Lecture - Sep 08 - G eneral Biology Administrative office...

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General Biology – 09/08/09 Administrative office hours: Tuesday 3:00 – 4:30 PM Thursday 3:30 – 5:00 PM Lecture review: Busch MSLC : Tuesday 1:40 – 2:40 PM [email protected] Arrive at lab on time and prepared. Proper lab attire and safety goggles required Quiz every lab! Chemicals are arranged in a very simple way and form larger molecules. The cell has smaller cellular structures in it called organelles. Cells with some similar function make up tissue – components of organs. Each organism belongs to a population. Humans belong to a population of humans. Ultimately all communities honor the biosphere. The cellular level with organelles What is a theory to a scientist? How does the cell theory relate to the evolution of life? Is a virus cellular? Is it alive? To a nonscientist, a theory is something that’s not necessarily true. A theory to a scientist is an overarching explanation for a large body of facts. It’s only when we take a lot of facts and put it together we have a theory. We use the term very differently. The cell theory has a lot of complications. They also relate to the evolution of life. The cell theory also asks us to ask all kinds of questions: is a virus alive, is it cellular? The basics of the cell theory : (1) Cells are the basic units of organization and function in all living organisms. (2) All cells come from preexisting cells. They do not arise di novo from some kind of stuff. We have powerful, very powerful evidence today that (3) all living cells have evolved from a common ancestor. Viruses are not cellular.
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All cells carry out a lot of chemical reaction. Metabolism: Anabolism - synthesis Catabolism – breaking things down Cells include a lot of water. For that reason we characterize the various components within the cell with respect to their relationship to water.
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