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
98
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
Completethenotesbelow.WriteNUMBERSAND/ORNOMORETHANTHREEWORDSforeachanswer.
Choosethecorrectletter,A,BorC.CourseFeedbackWhatsurprisedHirokoabouttheotherstudents’prese
ChooseTWOletters,A-E.WhatTWOthingsdoBradandHelenagreetosayaboutlisteningingroups?AListeningskillsareoften
Completethenotesbelow.WriteNOMORETHANTWOWORDSforeachanswer.AdvertisingEffectTheimportantfactortoconsider
Choosethecorrectletter,A,BorC.GENERALCOURSEDETAILSTheMicrobiologycoursesareavailablefor
Whichadvantageismentionedforeachofthefollowingrestaurants?ChooseSIXanswersfromtheboxandwritethecorrectletter
Choosethecorrectletter,A,BorC.Bobbychoosesfootballasprojecttopicbecause
Listenandcompletetheinformationbelow.Carportwidth:______mheight:______m
Althoughallsedimentaryrockscontainiron,(butthedeposits)that(arerichest)iniron(consist)predominantlyofminerals(
NarratorListentoalectureintheliteratureclass.WhydidWilliamFaulknerwriteaboutthesouthernstatesofAmerica?
随机试题
胃窦部有一圆形溃疡,直径为2cm,较浅,边缘不整齐,外形呈火山口状。最可能的诊断为
关节盘后区损伤的临床特征不包括
强心苷对下述心功能不全疗效较好的是
按照“守法”的准则,监理单位在经营活动中( )。
下列关于施工用电价格的说法正确的是()。
甲向乙借款,并以本人所有的一件古董花瓶设定质押担保,甲为此就该花瓶购买了一份财产意外损失险。在乙保管花瓶期间,花瓶毁于泥石流。如果甲没有按时还款,根据物权法律制度的规定,下列表述中,正确的是()。(2009年)
测评指导语包括的内容是()。
态度与品德实质相同,没有区别。
教师自觉地利用环境和自身教育因素对学生进行熏陶和感染的德育方法是()。
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】______tothem,whetherfromChi
最新回复
(
0
)