首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Mineral deficiencies can often be detected by specific symptoms such as chlorosis(loss of chlorophyll resulting in yellow or whi
Mineral deficiencies can often be detected by specific symptoms such as chlorosis(loss of chlorophyll resulting in yellow or whi
admin
2014-09-29
97
问题
Mineral deficiencies can often be detected by specific symptoms such as chlorosis(loss of chlorophyll resulting in yellow or white leaf tissue), necrosis(isolated dead patches), anthocyanin formation(development of deep red pigmentation of leaves or stem), stunted growth, and development of woody tissue in an herbaceous plant. Soils are most commonly deficient in nitrogen and phosphorus. Nitrogen-deficient plants
exhibit
many of the symptoms just described. Leaves develop chlorosis; stems are short and slender; and anthocyanin discoloration occurs on stems, petioles, and lower leaf surfaces. Phosphorus-deficient plants are often stunted, with leaves turning a characteristic dark green, often with the accumulation of anthocyanin. Typically, older leaves are affected first as the phosphorus is mobilized to young growing tissue. Iron deficiency is characterized by chlorosis between veins in young leaves.
According to paragraph 2, which of the following symptoms occurs in phosphorus-deficient plants but not in plants deficient in nitrogen or iron?
选项
A、Chlorosis on leaves
B、Change in leaf pigmentation to a dark shade of green
C、Short, stunted appearance of stems
D、Reddish pigmentation on the leaves or stem
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/OGfO777K
0
托福(TOEFL)
相关试题推荐
Completethetablebelow.WriteNOMORETHANTHREEWORDSforeachanswer.
Completethenotesbelow.WriteNOMORETHANTWOWORDSforeachanswer.NecessaryimprovementstotheexistingSelf-
Labelthemapbelow.Writethecorrectletter,A-l,nexttoquestions17-20.HinchingbrookeParkdog-walki
Choosethecorrectanswer,A,BorC.ProjectonworkplacementHowmanyacademicorganisationsreturnedDave’squestionnaire?
Completethenotesbelow.WriteONEWORDONLYforeachanswer.EngineeringforsustainabledevelopmentTheGreenhou
Completethenotesbelow.WriteONEWORDAND/ORANUMBERforeachanswer.ThingstodobeforewegoExam
Choosethecorrectanswer,A,BorC.Crocodilesliveingroupsofabout
Choosethecorrectletter,A,BorC.Accordingtothespeaker,whatistrueaboutthebus?
conversation/tocommunicate本题有关这位男士学日语的特定需求。录音原文中Iwillneedtobeableto…和I’llputdown提示其后为答案。由于题目要求不超过三个词,因此该空填写名词或者动词短语均可。
InfluenzaandVaccinesThereisnospecificcureforinfluenza.Recommendedtreatmentusuallyconsistsofbedrestandincre
随机试题
教学组织形式
治疗扭伤的取穴原则是
苯酚无效的病原微生物是
在我国目前,房地产登记是由同一个机构一次性完成的。()
证券自营业务投资范围或者投资比例违反规定的,对直接负责的主管人员和其他直接责任人员,给予警告,并处以10万元以上30万元以下的罚款。( )
在音乐作品中,旋律结束在主和弦的________音上,叫完全终止。
人在飞机起飞或降落时嚼·块口香糖,可以起到的作用是:
企业系统规划方法的基本原则不包括
JamesMarshalldidn’tknowwhathadhappenedtotheplaneuntil______.Whatwaslikelytohappenintheend?
YouwillhearareportpresentedbyajournalistfromTokyo.HetalksaboutthedifficultsituationsmetbyJapanesechemicalgr
最新回复
(
0
)