首页
登录
职称英语
Experts have differed about where the genus Varanus(monitor lizards)originated.
Experts have differed about where the genus Varanus(monitor lizards)originated.
游客
2024-01-11
40
管理
问题
Experts have differed about where the genus Varanus(monitor lizards)originated. Because most existing species live in Australia, early researchers concluded that Varanus originated in Australia and subsequently island hopped westward along the Indo-Australian archipelago. Herpetologist Robert Mertens later argued that Varanus probably originated in the archipelago. Chromosomal analysis has since supported Mertens’ contention, and in addition, geologic evidence points to a collision between the archipelago and the Australian landmass after Varanus evolved—a fact that could account for the genus’ present distribution.
A related puzzle for scientists is the present distribution of Varanus largest surviving species, the Komodo dragon. These carnivores live only on four small islands in the archipelago where, scientists note, the prey base is too small to support mammalian carnivores. But the Komodo dragon has recently been shown to manage body temperature much more efficiently than do mammalian carnivores, enabling it to survive on about a tenth of the food energy required by a mammalian carnivore of comparable size. [br] It can be inferred that which of the following is true of the "geologic evidence"(line 6)?
选项
A、It was first noted by Mertens as evidence in favor of his theory about the origins of Varanus.
B、It cannot rule out either one of the theories about the origins of Varanus discussed in the passage.
C、It accounts for the present distribution of the Komodo dragon.
D、It has led to renewed interest in the debate over the origins of Varanus.
E、It confirms the conclusions reached by early researchers concerning the origins of Varanus.
答案
B
解析
Choice B is correct. The passage presents the "geologic evidence" so as to provide a possible explanation for the prevalence of the various species of Varanus in Australia if indeed Mertens’ theory is correct. But the evidence itself does not rule out the possibility that the earlier theory is correct and that Mertens is not, so the "geologic evidence" cannot rule out either theory. Choice A is incorrect because there is no specific indication that Mertens first provided this evidence, and the chronology of the presentation suggests that he did not. Choice C is incorrect as there is no mention in the passage of a specifically renewed interest in the debate. Choice D is incorrect since the "geologic evidence" does not rule out nor confirm either Mertens’ conclusions or those of earlier researchers.
转载请注明原文地址:https://tihaiku.com/zcyy/3351769.html
相关试题推荐
Itiscommonlyheldamongmarketingexpertsthatinanonexpandingmarketacomp
Manypolicyexpertssaythatshiftingaportionofhealth-benefitcostsbackto
Aslitigationgrowsmorecomplex,theneedthatexpertsexplaintechnicalissues
BROACH:A、abridgeB、comfortC、possessD、sealupE、monitorD
WARNING:ADMONITORY::A、decision:ambiguousB、alibi:exculpatoryC、deformity
A、CautiousbutpositiveB、ApprehensiveandadmonitoryC、Neitherconcernednorop
Expertsbelievethathumanshavetentrillioncellsintheirbodieswhich(i)___
ExpertshavedifferedaboutwherethegenusVaranus(monitorlizards)originated.
ExpertshavedifferedaboutwherethegenusVaranus(monitorlizards)originated.
ExpertshavedifferedaboutwherethegenusVaranus(monitorlizards)originated.
随机试题
AnavidBushsupporterwhoalreadyhas25shoppingmallstohisname,Congel
[originaltext]ChristmasisthetimewhenChristiansaroundtheworldcelebr
Retrofittinghousestouselessenergys
在以下材质的门中,价格最高的是()。A.松木门 B.硬木门 C.空腹钢门
下列所示灯具中,属于半间接照明的是( )。 A. B. C. D.
患者男,30岁,因脑外伤后昏迷入院,护士准备通过鼻饲为其提供营养。护士插胃管时,
Sauna【桑拿浴】 Ceremonial(仪式性的)bathingha
陶行知曾用松树和牡丹比喻育人:用松树的肥料培养牡丹,牡丹会瘦死;用牡丹的肥料培养
经检验检疫机构预检的出口货物,可直接向口岸检验检疫机构办理换证放行手续,无须提供
尾矿库应当每()至少进行一次安全现状评价。A.6个月 B.18个月 C.1年
最新回复
(
0
)