首页
登录
职称英语
Several years ago, as a measure to reduce the population of gypsy moths, which d
Several years ago, as a measure to reduce the population of gypsy moths, which d
游客
2025-02-26
42
管理
问题
Several years ago, as a measure to reduce the population of gypsy moths, which depend on oak leaves for food, entomologists introduced into many oak forests a species of fungus that is poisonous to gypsy moth caterpillars. Since then, the population of both caterpillars and adult moths have significantly declined in those areas. Entomologists have concluded that the decline is attributable to the presence of the poisonous fungus. Which one of the following, if true, most strongly supports the conclusion drawn by the entomologists?
选项
A、A strain of gypsy moth whose caterpillars are unaffected by the fungus has increased its share of the total gypsy moth population.
B、The fungus that was introduced to control the gypsy moth population is poisonous to few insect species other than the gypsy moth.
C、An increase in numbers of both gypsy moth caterpillars and gypsy moth adults followed a drop in the number of some of the species that prey on the moths.
D、In the past several years, air pollution and acid rain have been responsible for a substantial decline in oak tree populations.
E、The current decline in the gypsy moth population in forests where the fungus was introduced is no greater than a decline that occurred concurrently in other forests.
答案
A
解析
(A)能支持昆虫学家得出的结论。因为我们由一种其毛虫不受真菌影响的吉卜赛蛾在整个吉卜赛蛾中的比例增加可推出,受真菌影响的吉卜赛蛾的数量在下降。(E)对昆虫学家的结论构成了反对,(B)、(C)和(D)都是无关选项。
转载请注明原文地址:https://tihaiku.com/zcyy/3973171.html
相关试题推荐
Severalyearsago,asameasuretoreducethepopulationofgypsymoths,whichd
Thestatewiththegreatestfractionofitspopulationinurbanareas,iftheur
Duringthenineteenthcentury,Britain’surbanpopulationincreasedasitsrural
Onthebasisofadecreaseinthecollege-agepopulation,manycollegesnowanti
Technologicalimprovementsandreducedequipmentcostshavemadeconvertingsola
Ironically,peoplewhouseaspartameasasweetenertoreducetheircaloricinta
Thenuclearpolyhedrosisvirushelpscontrolgypsymothpopulationsbykillingt
SpeakersoftheCaronianlanguageconstituteaminorityofthepopulationinsev
Severalstudieshavefoundthatthecoronarypatientswhoexercisemostactively
Severalrecentstudiessuggestthatachildbornintoafamilywhosemembershav
随机试题
TheUpperPaleolithicRevolutionP1:Theoldstoneageistheearliestperiodof
Hisfathercamehometodinnereverynight,and______inhislifeJackfelttha
[originaltext]Forcenturies,parrotshavebeenprizedpetsbecauseoftheir
秦朝的“三公”是指()。A.司马、司徒、司空 B.丞相、太尉、御史大夫 C
请选出以下对波阻抗和电阻在物理本质上不正确的表述()。A.一条长线的电阻与线路
甲、乙、丙设立一(普通)合伙企业,约定损益的分配和分担比例为4:3:3。该企业欠
如图6,图中箭头所指的骨骼是()。 A.额骨 B.顶骨 C.颞骨 D
炒后缓和寒滑之性的是( ) A.王不留行 B.牵牛子 C.牛蒡子 D.
中二班要举行画展,孩子们纷纷带来了个人作品。赵老师当众挑选“好的作品”,并将“不
以下属于合作机构管理措施的有()。A.加强贷前调查,切实核查合作机构的资信状
最新回复
(
0
)