首页
登录
职称英语
Mycorrhizal fungi infect more plants than do any other fungi and are necessa
Mycorrhizal fungi infect more plants than do any other fungi and are necessa
游客
2025-05-09
19
管理
问题
Mycorrhizal fungi infect more plants than do any other fungi and are necessary for many plants to thrive, but they have escaped widespread investigation until recently for two reasons. First, the symbiotic association is so well-balanced that the roots of host plants show no damage even when densely infected. Second, the fungi cannot as yet be cultivated in the absence of a living root. De spite these difficulties, there has been important new work that suggests that this symbiotic association can be harnessed to achieve more economical use of costly super phosphate fertilizer and to permit better exploitation of cheaper, less soluble rock phosphate, Mycorrhizal benefits are not limited to improved phosphate uptake in host plants. In legumes, mycorrhzal inoculation has increased nitrogen fixation beyond levels achieved by adding phosphate fertilizer alone. Certain symbiotic associations also increase the host plant’ s resistance to harmful root fungi. Whether this resistance results from exclusion of harmful fungi through competition for sites, from metabolic change involving antibiotic production, or from increased vigor is undetermined. [br] Which of the following most accurately describes the passage?
选项
A、A description of a replicable experiment
B、A refutation of an earlier hypothesis
C、A summary report of new findings
D、A confirmation of earlier research
答案
C
解析
综观全文,以及文章开头提到的“but they have escaped widespread investigation until recently”可知这是对一个科学新发现的阐述。A项“对可重复实验的描述”,B项“对假设的批驳”,D项“对早期研究的确认”均不对。
转载请注明原文地址:https://tihaiku.com/zcyy/4068228.html
相关试题推荐
Sinceneithersidewasreadyto______whatwasnecessaryforpeace,hostilityw
(Itshardlyevernecessary)toaskahungryboy(tocometo)dinnertwicebecaus
Hisworkshedprovocativeyetnecessarylight,onanimportantwaytoslowthes
BeforetheUScanbuildtheadvancednuclearpowerplantsitcansellabroad
BeforetheUScanbuildtheadvancednuclearpowerplantsitcansellabroad
Mycorrhizalfungiinfectmoreplantsthandoanyotherfungiandarenecessa
Malariaisallinfectiousparasiticdiseasethatcanbeeitheracuteorchronic
Educationandexperienceintheseareasmaybenecessarytotrainonecompetentl
Thereisnonecessaryintrinsicconnectionbetweenawordandthethingitrefer
MostpeoplewhodevelopLymedisease,atick-borneinfectionthat’sendemic
随机试题
Literatureisameansbywhichweknowourselves.Byitwemeet【M1
HangzhouABCExportCorporation182,XihuRoad,HangzhouSeptember15,2015Laws
PASSAGETHREEGoodchancesforscientificbreakthrough.推断题。由题干中的collaborativepro
Englishmagazineswilloftenadvertisethemselvesasbeingdevotedtosport
化学与我们的日常生活紧密相关.下列说法错误的是()
我国基金管理人进行封闭式基金的募集,必须依据()的有关规定,向中国证监会提交相关
噪声,从物理性质上看,是由声源作无规则的非周期性振动而产生的,听起来有嘈杂、刺耳
赵女士有一个女儿,她对女儿教育目标的设定不符合子女教育规划重要原则的是( )。
关于青春期生理发育加速的描述,不正确的是()。 (A)身体成长加速(B)生
药品生产企业因违反法律、法规、规章规定造成上市药品存在安全隐患,违法行为轻微并及
最新回复
(
0
)