首页
登录
职称英语
Caterpillars off all species produce an identical hormone called "juvenile hormo
Caterpillars off all species produce an identical hormone called "juvenile hormo
游客
2024-01-13
20
管理
问题
Caterpillars off all species produce an identical hormone called "juvenile hormone" that maintains feeding behavior. Only when a caterpillar has grown to the right size for pupation to take place does a special enzyme halt the production of juvenile hormone. This enzyme can be synthesized and will, on being ingested by immature caterpillars, kill them by stopping them from feeding. Which of the following, if true, most strongly supports the view that it would not be advisable to try to eradicate agricultural pests that go through a caterpillar stage by spraying croplands with the enzyme mentioned above?
选项
A、Most species of caterpillar are subject to some natural predation.
B、Many agricultural pests do not go through a caterpillar stage.
C、Many agriculturally beneficial insects go through a caterpillar stage.
D、Since caterpillars of different species emerge at different times, several sprayings would be necessary.
E、Although the enzyme has been synthesized in the laboratory, no large-scale production facilities exist as yet.
答案
C
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/3358949.html
相关试题推荐
Thesearchwas_________whenthefoggotthicker.A、calledoffB、calledonC、calle
Mr.Holmescalledatmanyschools_________helivedtoaskthemtoaccepthisson
In1866,sailorsonaGermanshipcalledPaulathrewabottlewithamess
In1866,sailorsonaGermanshipcalledPaulathrewabottlewithamess
In1866,sailorsonaGermanshipcalledPaulathrewabottlewithamess
Acertaintirecompanycanproducetiresatacostof$22,500perbatchplus$9
Accordingtothepassage,thefivewell-knownplanthormonesarenotusefulinc
Accordingtothepassage,thefivewell-knownplanthormonesarenotusefulinc
Caffeine,thestimulantincoffee,hasbeencalled"themostwidelyusedpsy
Caffeine,thestimulantincoffee,hasbeencalled"themostwidelyusedpsy
随机试题
AccordingtotheWorldHealthOrganisation,malaria,adiseasespreadbymosquit
[originaltext]Walkingistheoldestwayofgettingaround—andstilloneof
Xiongan,China.【L1】______ofnationalsignificance.AsChinaentersanewer
Inmanycountries,suchasFrance,Greece,andJapan,itisoftenmorediffi
你发现学生偏科怎么办?
秩边穴的定位是A.平第1骶后孔,骶正中嵴旁开3寸 B.平第2骶后孔,骶正中嵴旁
A.脾虚湿盛B.阴血亏虚C.气虚D.实证E.津液不足瘦薄舌的主病是
治疗钩端螺旋体病应首选A.链霉素 B.青霉素G C.红霉素 D.氯霉素
甲乙两地有公共汽车,每隔3分钟就从两地各发一辆汽车,30分驶完全程。如果车速均匀
远期合约是双方在将来的一定时间,按照合约规定的价格交割货物,支付款项的合约。同远
最新回复
(
0
)