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
2025-02-22
7
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] It may be inferred from the passage that, in contrast to their present view, microbiologists once believed that
选项
A、only a single feature of endospore biology was responsible for their success
B、potentially, a canning process could be developed that was capable of destroying all endospores
C、ultraviolet radiation was a possible means of destroying microorganisms that practice cellular dormancy
D、cellular mitosis was the root cause of the resilience of the microorganisms under discussion
E、only single-celled organisms, like those of fungal spores, could practice cellular dormancy
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3967292.html
相关试题推荐
Innosense______,thebillionaire’sfortunessurvivedyetanotherfinancialpan
Manymicroorganismssurvivesuchenvironmentalstressesasheat,cold
Manymicroorganismssurvivesuchenvironmentalstressesasheat,cold
The______ofsedimentintherivercausedconcernamongenvironmentalistsandind
Thesupplyoffreshwatercontinuestobea______formostenvironmentalistssinc
Ifbigsumsaretobespentoncleaningupenvironmentaldisasters,itisbetter
AlthoughthehardyemperorpenguinsurvivesinAntarcticaingreatnumbers,the
Someenvironmentalistsfearthatthepracticescontributingtoglobalwarmingar
AlthoughotherEuropeanstatesbrokeapartunderthestressesofpoliticaluphea
Ethnologistsareconvincedthatmanyanimalssurvivethroughlearningbutlearni
随机试题
Inthetraditionofthecompany,thisdictionaryprovidesespeciallygoodco
WhathaveSriLanka’sTamilTigerrebelsadmitted?[originaltext]SriLanka’sTa
Youthisnotamatteroftimebutamatterofself-improvement,bothphysicall
[originaltext]SomestudentsattheOpenUniversityleftschool20yearsago.
基本直接费包括()。A.人工费 B.材料费 C.施工机械使用费 D.
能彻底破坏热原的条件是A.180℃加热30min B.180℃加热120min
人力资源管理的意义有( )。A.帮助管理人员实现目标 B.有利于降低企业成本
头脑风暴法的应用步骤可分为三个阶段,这三个阶段是()。 A.准备阶段B.引
单式针刺补泻手法除基本补泻外其他是指A.捻转补泻 B.疾徐补泻 C.迎随补泻
灭亡西晋的胡族是()A.匈奴 B.鲜卑 C.氐族 D.羌族
最新回复
(
0
)