首页
登录
职称英语
Many microorganisms survive such environmental stresses as heat, cold
Many microorganisms survive such environmental stresses as heat, cold
游客
2024-01-11
61
管理
问题
Many microorganisms survive such environmental stresses as heat, cold
and desiccation not by rapid rates of mitosis, but by producing specialized cells
designed to persist in a dormant state in hostile environments. Most fungi, for
Line example, yield single-celled spores, which, through wind distribution, can
(5) survive for long periods of time before germinating and sprouting fungal
filaments of their own. Other types of bacteria produce a special type of spore
called an endospore, capable of withstanding such extremes as boiling and
freezing temperatures, and even ultraviolet radiation.
Though research results remain tentative, several factors may protect
(10) endospores from environmental stress: they have a low water content, unusual
proteins and a tough spore coat absent in mature bacterial cells. When garden
fruits and vegetables, which may contain botulism endospores, are preserved by
canning at boiling temperatures, we know that these spores survive the heat
and sprout in the food, and as a result, the bacteria generate the botulism toxin
(15) that can lead to food poisoning-proof of their magnificent resilience. [br] The passage mentions all of the following as environmental stresses that can be survived by microorganisms that practice cellular dormancy EXCEPT
选项
A、Low temperatures
B、Ultraviolet radiation
C、Acidic environments
D、High temperatures
E、Drying processes
答案
C
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3352729.html
相关试题推荐
Insettingenvironmentalstandardsforindustryandotherstomeet,itisinadvi
Therecyclingofmunicipalsolidwasteiswidelyseenasanenvironmentallypref
Thefollowingisalettertotheeditorofanenvironmentalmagazine."Twostudi
A、carbondioxidetendstoalleviateenvironmentalhaze,whilesulfurousgasesus
Innosense______,thebillionaire’sfortunessurvivedyetanotherfinancialp
Manymicroorganismssurvivesuchenvironmentalstressesasheat,cold
Howanyfetussurvivesgestationhasbaffledscientistsfordecades:theembryo’
Manymicroorganismssurvivesuchenvironmentalstressesasheat,cold
Manymicroorganismssurvivesuchenvironmentalstressesasheat,cold
The______ofsedimentintherivercausedconcernamongenvironmentalistsandind
随机试题
Ifitisleft______,thisfastspreadingdiseaseislikelytoaffectmillionsof
______isthestudyofmeaning.A、SemanticsB、SyntaxC、PragmaticsD、MorphologyA语义
Manytheoriesconcerningthecausesofjuveniledelinquency(crimescommitt
说明:假设你是王亮,请用下面提供的信息写一封自荐信。时间:3月12日内容:1.写信原因:在网上看到TotalTrade公司招聘销售经理;2.自我介绍:
[originaltext]M:Igottwolettersthismorningwithjoboffers,onefromtheP
Thepartiestogovernmentprocurementre
已知变量X和Y的协方差为-40,X的方差为320,Y的方差为20,其相关系数为(
共用题干 第一篇MoreThanaRidetoSchoolTheN
在下列有关“医疗机构药房特殊调剂”的叙述中,不正确的是A:根据患者的要求 B:
我国目前共出版了几版《中国药典》A.5版 B.6版 C.7版 D.10版
最新回复
(
0
)