首页
登录
职称英语
Scientists have known for some time that certain plants, called hyperaccumu-
Scientists have known for some time that certain plants, called hyperaccumu-
游客
2025-02-06
17
管理
问题
Scientists have known for some time that certain plants, called hyperaccumu-lators, can concentrate minerals at levels a hundredfold or greater than normal. A survey of known hyperaccumulators identified that 75 percent of them amassed nickel; cobalt, copper, zinc, manganese, lead, and cadmium are other minerals of choice. Hyperaccumulators run the entire range of the plant world. They may be
herbs
,
shrubs
, or
trees
. Many members of the mustard family, spurge family, legume family, and grass family are top hyperaccumulators. Many are found in tropical and subtropical areas of the world, where accumulation of high concentrations of metals may
afford
some protection against plant-eating insects and microbial pathogens. [br] Why does the author mention "
herbs
," "
shrubs
," and "
trees
"?
选项
A、To provide examples of plant types that cannot tolerate high levels of harmful minerals
B、To show why so many plants are hyperaccumulators
C、To help explain why hyperaccumulators can be found in so many different places
D、To emphasize that hyperaccumulators occur in a wide range of plant types
答案
D
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3944792.html
相关试题推荐
Scientistshaveknownforsometimethatcertainplants,calledhyperaccumu-
Onlyrecentlyhaveinvestigatorsconsideredusingtheseplantstocleanups
Onlyrecentlyhaveinvestigatorsconsideredusingtheseplantstocleanups
Scientistshaveknownforsometimethatcertainplants,calledhyperaccumu-
Scientistshaveknownforsometimethatcertainplants,calledhyperaccumu-
Muchoftheresearchonnutrientdeficienciesisbasedongrowingplantshyd
Thistypeoflearning,however,iscalledconditioning.[img]2014m9s/ct_etoef
[img]2018m9s/ct_etoefz_etoeflistz_201808_0044[/img][br]Whatdidscientistslea
ControversyaboutCausingEmotionP1:Thefactthatwereacttocertainexperien
ControversyaboutCausingEmotionP1:Thefactthatwereacttocertainexperien
随机试题
Manyhighachieverswholovetheircareersfeelthattheyarehappiestwhenthey
Aprojectlikelytoevolveinthenearorintermediatefutureisspacetouri
Americansareahighly【B1】______people.Whatfactorscausethemtomove?T
C=200+0.5y,I=800-5000r,1=0.2Y-4000r
招标工程量清单中有现浇混凝土及钢筋混凝土实体:工程项目,其措施项目清单中未编列现
关于牙周变性的说法,不正确的有A.牙周膜内血管的变化可直接引起牙周炎 B.指牙
商业银行债券投资业务主要面临四种关联性风险为()。A.市场风险 B.信用风
属于语言性交流的是A.手势 B.沉默 C.倾诉 D.面部表情 E.专业性
同事间建立和谐关系应该遵循的原则包括( )。A.多做事少说话 B.彼此看
按照索赔的目的不同,索赔可分为()。A.合同索赔与非合同索赔B.工期索赔与费用
最新回复
(
0
)