09 Plants II - PlantsII Some Unique Structural Features...

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Plants II Some Unique Structural Features Photosynthesis Transgenic Plants Secondary Metabolites  Plant Hormones Ethylene Auxin Movement in Plants
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Exams may be picked up in the Biological Science Department Office, first floor MRBIII Starting Tuesday Morning (2/9/10). Re-grading requests must be made within one week of the return of the exam. All such requests must be made in writing . The written request must include a discussion of the basis for requesting a re-grade that includes an explicit explanation of how your answer addresses the points that are covered in the answer key for the exam – what did you put in your answer that should have received points but did not. Consulting the answer key (which will be posted on Blackboard) is a prerequisite to requesting a re-grade. Note : If I determine the answer is worth less than you received from the grader, I will take off points. This is not unusual – so before you submit a request you should do the research (check textbook, powerpoints, or go the library) to make sure you’re right. Re-grade requests are due by the end of office hours Tuesday Feb. 16. This is a firm deadline!
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Plants Almost all life on earth is based on plants, because they are solar-powered  and trap the sun's energy for other life to use. They produce the oxygen we breathe, and transformed the atmosphere of  Earth, making aerobic metabolism possible.
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Karp 8.36 Unique/unusual features of plant cells: Cell walls, chloroplasts (cpDNA), large vacuoles,  plasmodesmata, polyploidy, self-fertilization possible (but not preferred). Campbell Fig. 6.9 Campbell Fig. 6.30 Plasmodesmata –the cytoplasm of one plant cell is continuous with  the cytoplasm of it neighbors. Unfies most of the plant into a  continuum.
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Photosynthesis Purves 8.3 Thylakoid membranes: Convert the energy of  sunlight into chemical energy. They are the  most  abundant membranes on earth. Rubisco: Fixes carbon in the Calvin Cycle of  photosynthesis (Rubisco constitutes 50% of all  protein in the leaf).  The most important reaction  on earth, catalyzed by the most abundant protein  on earth. Purves 8.14 3-phosphoglycerate
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Plants: Non-food Uses Cotton
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Corn Rice Soybeans Plants as Food Wheat Potatoes
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Purves Table 16.2 Plants: the "Green Revolution" Genetic therapy has not yet worked well in humans, but the creation of  transgenic plants has been successful and is big business (but controversial).
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Transgenic plants are simply  the latest step in a  thousands-year old  experiment in plant  breeding. Transgenic plants are a 
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09 Plants II - PlantsII Some Unique Structural Features...

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