首页
登录
职称英语
Because adult iguanas on Plazos Island are much smaller than adult iguanas of th
Because adult iguanas on Plazos Island are much smaller than adult iguanas of th
游客
2025-02-26
8
管理
问题
Because adult iguanas on Plazos Island are much smaller than adult iguanas of the same species on nearby islands, researchers assumed that environmental conditions on Plazos favor the survival of relatively smaller baby iguanas(hatchlings)in each yearly brood. They discovered instead that for each of the past three years, 10 percent of the smaller and 40 percent of the larger hatchlings survived, because larger hatchlings successfully evade their predators. Which of the following, if true about Plazas but not about nearby islands, contributes most to an explanation of the long-standing tendency of iguanas on Plazos to be smaller than those of the same age on nearby islands?
选项
A、Periodic wind shifts cause extended dry spells on Plazos every year, putting the larger iguanas, whose bodies require relatively more water, at a great disadvantage.
B、There are exactly three species of iguanas on Plazos but only two species of seagulls that feed on iguanas, and a relatively small percentage of each year’s hatchlings are consumed by seagulls.
C、Wild cats, which were introduced as pets by early settlers and which were formerly major predators of Plazos iguanas, were recently killed off by a disease specific to cats.
D、The iguanas on Plazos are a relatively ancient part of the island’s animal life.
E、Both land and marine iguanas live on Plazos, and the land iguanas tend to be larger than marine iguanas of the same age.
答案
A
解析
本题问题目的为解释两者差异,重点抓住差异点——本题中为“小”,并用之定位,在5个选项中涉及“大、小”概念的只有(A)与(E)两个选项。而(A)指出由于气候原因,Plazos岛上的大蜥蜴生存条件恶化,再加上问题目的中的“if true about plazos but not about nearby islands”,所以(A)正确,(E)只说明陆地蜥蜴比海洋蜥蜴大,却不能说明为什么比其他岛上的蜥蜴小。
转载请注明原文地址:https://tihaiku.com/zcyy/3973458.html
相关试题推荐
Becausetheprocessoffreezingfoodconsumesenergy,manypeoplekeeptheirele
ThewildmouflonsheepoftheislandofCorsicaaredirectdescendantsofsheep
AlthoughmanybrandsofgasolinearesoldonHaibeiisland,gasolinecompaniest
MostLargecompaniesprefercustomizedcomputersoftwarebecauseitcanbemolde
IguanashavebeenanimportantfoodsourceinLatinAmericasinceprehistoricti
Becausetheenemy’snewshipisthequietestanditisthereforethemostelusiv
Someanalystspointoutthatbecausepeoplearebecomingaccustomedtoasteady
SchooldesegregationhasworkedwellinBuffalo,NewYork,inpartbecauseparen
TheRorschzchtestisgainingnewrespectasadiagnostictoolbecauseittakes
BecauseHalley’scometchangesorbitslightlyduringtheseventy-six-yearinterv
随机试题
Ifinditwholesometobealonethegreaterpartofthetime.Tobeincompa
ARVshaven’tbeenusedwidelytopreventHIVtransmissionorinfectionforlack
政策价值
患儿女性,3个月,该患儿左侧腭部由软腭到切牙孔完全裂开,但牙槽突未裂开,右侧腭部
乌梢蛇脊部高耸成屋脊状,俗称为A.佛指甲B.剑脊C.虎牙D.合把E.翘鼻头
二级生物安全防护水平主要研究的对象为A.通常不引起健康成人疾病的第四类危害的微生
可以将培训风险分为内在风险和( )。A.培训被否定风险 B.培训效果不佳风险
非结算会员的客户申请或者注销其交易编码的,由结算会员按照期货交易所的规定办理。(
组成人体蛋白质多肽链的基本单位是A:L-α-氨基酸 B:D-α-氨基酸 C:
采用真空断路器开断启动过程中的高压感应电动机时,截流过电压和三相同时开断过电压可
最新回复
(
0
)