Bio%20201%20S12%20Lect%2018%20%28True%29%20v2

Bio%20201%20S12%20Lect%2018%20%28True%29%20v2 - Biology in...

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Biology’in’the’News’ (see’folder’on’BB)’ An’11-year’experiment’on’13’plant’species’in’the’ US’Midwest’has’inves±gated’how’increased’carbon’ dioxide’in’the’atmosphere’would’aFect’the’plants'’ growth’ current’models’of’climate’change’have’the’ assump±on’that’plants’will’take’up’the’excess’CO 2’ However,’the’new’data’suggests’that’the’ability’for’ some’plant’communi±es’to’absorb’excess’CO2’may’ be’lower’than’previously’thought’ in’the’plots,’some’plants’were’grown’with’higher’ ambient’CO 2 ’and’Nitrogen’concentra±ons’(371’2m’ x’2m’plots,’6’circles’of’plots’61-63’plants’per’plot),’ others’(controls)’were’not’ leaf’photosynthesis’rates’in’the’enriched’plots’ increased’by’about’10%;’previous’work’had’ suggested’that’rates’should’increase’by’25%;’the’ new’work’took’place’in’non’Nitrogen’limi±ng’ condi±ons,’unlike’some’previous’studies’ these’results’need’to’be’built’into’the’models’and’ will’likely’mean’that’CO 2 ’will’increase’at’a’faster’ rate’in’the’atmosphere’than’previously’thought’ hRp://www.nsf.gov/news/news_summ.jsp? cntn_id=119583&WT.mc_id=USNS²_51&WT.mc_ev=click’
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Supplemental’Bio’in’the’News (will’not’be’an’exam’quesAon) nodding’disease’ liRle-known’disorder’that’emerged’in’ Sudan’in’the’1960s’ afects’small’children’ nodding-like’seizures’occur’just’prior’ to’eaAng’Familiar’(but’not’Familiar)’ Food’or’when’the’child’Feels’cold’ progressive’neurodegeneraAve’ disorder,’generally’Fatal’within’3’years’ associated’with’inFecAons’oF’the’ parasiAc’nematode’worm’ Onchocerca volvulus ,’prevalent’in’Sudan’ O. volvulus ’is’carried’by’black’flies’(Family’ Simuliidae)’and’causes’river’blindness’ disease,’as’well’ mechanisAc’basis’oF’the’disease’is’ unknown’and’other’potenAal’contributors,’ such’as’chemical’exposures,’are’also’under’ invesAgaAon’ video link: http://bcove.me/ggdawgfb Facebook Link: https:// www.facebook.com/#!/groups/ 234568559968680/ thanks to Bio 201 student Nirjhar Kabery
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2 nd ’mid’term’exam’ Wed.’Mar.’14 th ’IN’CLASS’ on’lectures’11’through’19’
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