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
22
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] The level of information in the passage above is suited to the needs of all of the following people except ______.
选项
A、an official of a research foundation who identifies research projects for potential funding
B、a state official whose position requires her to alert farmers about possible innovations in farming
C、a researcher whose job is to identify potentially profitable areas for research and product development
D、a botanist Conducting experiments to determine the relationship between degree of mycorrhizal infection and expected uptake of phosphate
答案
B
解析
本题问的是这篇文章的信息水平不是用来满足哪类人的需要的。本文写的很专业化,用了很多生物学术语,学术水平较高,所以它应是写给那些本领域的专业人士的。答案B说的是写给需要督促农民就耕作方面的革新警惕的官员,官员并不需要具备如此深的专业知识去指导农民,所以B是正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/4068230.html
相关试题推荐
BeforetheUScanbuildtheadvancednuclearpowerplantsitcansellabroad
BeforetheUScanbuildtheadvancednuclearpowerplantsitcansellabroad
TheWTOleadershadbeenurgedsomecountriestomakenecessaryconcessiontopr
Thereisnonecessaryintrinsicconnectionbetweenawordandthethingitrefer
Inalmostallchemical-processplants,heatis______byburningoffossilfuels
MostpeoplewhodevelopLymedisease,atick-borneinfectionthat’sendemic
MostpeoplewhodevelopLymedisease,atick-borneinfectionthat’sendemic
MostpeoplewhodevelopLymedisease,atick-borneinfectionthat’sendemic
MostpeoplewhodevelopLymedisease,atick-borneinfectionthat’sendemic
MostpeoplewhodevelopLymedisease,atick-borneinfectionthat’sendemic
随机试题
Aprojectlikelytoevolveinthenearorintermediatefutureisspacetouri
[originaltext]W:Sam,couldyoureviewtheresultsofthesurveyonleisurespo
Thereisapopularbeliefamongparentsthatschoolsarenolongerintereste
Whatcanwelearnabouttheman?[br][originaltext]W:IhavewithmeJimClark
A.阳和汤 B.化痰开郁方 C.丹栀逍遥散合清肝芦荟丸 D.五味消毒饮合化
有关新生儿颅内出血的描述,错误的是A.由产伤和缺氧引起 B.产伤性颅内出血,足
治疗风热感冒、温病初起,常配伍同用的药物是A、麻黄、桂枝 B、桂枝、白芍 C
患者进行了肠梗阻手术之后,因一直未通气,医嘱行肛管排气。肛管插入的深度是( )
急性弥漫性腹膜炎的临床表现有A.腹痛 B.发热 C.腹肌紧张 D.肠鸣音增
小儿各年龄分期,正确的是 A.围产期,生后脐带结扎至生后7天 B.新生儿期,
最新回复
(
0
)