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1、SAT2生物专业词汇-N小马过河为大家准备了“SAT2生物专业词汇-N”，供各位备考SAT的考生们参考使用，来提高白己的托福成绩！免费咨询电话：400-0123-267NADHAnenergy-carryingcoenzymeproducedbyglycolysisandtheKrebscycle・NADHcarriesenergytotheelectrontransportchain,whereitisstoredinATP・naturalselection（g然选择）Thetheory,firstproposedbyDarwin,w
2、hichholdsthatorganismsproduceasmanyoffspringaspossible,whichcompeteforlimitedresources・Organisms，characteristicsvary,andceriaincharacteristicswi11alloworganismstosurviveandreproducemoreeffectively.Theseadaptivecharacteristicswillbemoreprevalentinsubsequentgenerations・Nat
3、uralselectionistheengineofevolution,choosingthemostfitgenestopassfromonegenerationtothenext・Nephridium（肾管）Abloodfiltrationandexcretoryorgancharacteristicofsegmentedworms・Nephron（肾单位）：肾的解剖与功能单位，包括-肾小球等Tiny,tubulestructuresresponsibleforthefilteringofbloodinthekidneysofver
4、tebrates・neriticzone（浅海水层）Themediumdepthzoneofthemarinebiome・Extendsto600feetbeneaththewalerTssurfaceandsitsonthecontinentalshelf,hundredsofmilesfromanyshore・Algae,crustaccans,andfishinhabitthisregion.nervoussystem（神经系统）Controlsystemofthebodythatfunctionsbysendingimpulse
5、sthroughneuronstoreceiveinformationandspurmusclestoaction.Neuron（神经元）Thefunctionalunitofthenervoussystem・Aneuronisaspecializedcellabletocarryanactionpotentialandmadeupofdendrites,acellbody,andanaxon.Therearethreetypesofneurons:sensory,motor,andinterneurons.Niche（生态龛）Theu
6、niqueroleapopulationplaysinacommunity・Anicheineludesallcharacteristicsthatdefinethewayapopulationexistsinacommunity,fromwherethememberslivetowhattheyeat,whentheysleep,andhowtheyreproduce・nitrogenousbase（含氮碱基）Oneofthenittogen-containingbasesinDNAandRNAnucleotides・Thereare
7、fivenitrogenousbasesin1ivingorganisms.DNAiscomposedofadenine,thymin®guanine,andcytosine・R7Aiscomposedofadenine,uraci1,guanine,andcytosine.Nondisjunction（不分离）:细胞分裂时成对的染色体无法分开Occurswhenapairofhomologouschromosomesfailstoseparateduringgameteformation.Theoffspringproducedfro
8、mthesegameteshaveeitheronetoonkinyoronetoofewofaptirticularchromosome・Nondisjunctionisthecauseofgenetic
