理学

名词解释题基因库(gene pool)

题目
名词解释题
基因库(gene pool)
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相似问题和答案

第1题:

TheAutomaticSharedMemoryManagementfeatureisenabledforthePRODdatabase.Currently,alotofinsertactivityistakingplaceinthedatabase,andthememorystructuresareallocatedaccordingtothedatabaseworkload.Astheworkloadreduces,youdecidetoperformbatchjobsinthedatabase.WhichofthefollowinginitializationparametersareNOTautomaticallyresizedaccordingtothenewworkloadandcontinuetoremainunchanged?()

A.LOG_BUFFER

B.DB_CACHE_SIZE

C.JAVA_POOL_SIZE

D.LARGE_POOL_SIZE

E.SHARED_POOL_SIZE

F.STREAMS_POOL_SIZE


参考答案:A, F

第2题:

管理员在Router上进行了如下配置,完成之后,在该路由器的G1/0/0接口下连接了一台交换机,则关于此主机的IP地址描述正确的是( )。[Router]ip pool pool1[Router-ip-pool-pool1]network 10.10.10.0 mask 255.255.255.0[Router-ip-pool-pool1]gateway-list 10.10.10.1[Router-ip-pool-pool1]quit[Router]ip pool pool2[Router-ip-pool-pool2]network 10.20.20.0 mask 255.255.255.0[Router-ip-pool-pool2]gateway-list 10.20.20.1[Router-ip-pool-pool2]quit[Router]interface GigabitEthernet 1/0/0[Router-GigabitEthernet 1/0/0]ip address 10.10.10.1.24[Router-GigabitEthernet 1/0/0]dhcp select global

A.获取的IP地址属于10.10.10.0/24网络
B.获取的IP地址属于10.20.20.0/24网络
C.主机获取不到IP地址
D.获取的IP地址可能属于10.10.10.0/24网络,也可能属于10.20.20.0/24网络

答案:A
解析:
华为DHCP地址配置

第3题:

YouareconfiguringthePRODdatabasetouseaninternaltuningalgorithmtomonitortheperformanceoftheworkload.Toachievethisconfiguration,youspecifythefollowingparametersettingsintheSPFILE:SGA_TARGET=512MSHARED_POOL_SIZE=256MWhichtwostatementsaretruewhenmodifyingtheSHARED_POOL_SIZEinitializationparameterintheSPFILE?()

A.ModifyingtheSHARED_POOL_SIZEinitializationparametercannotbeaccomplishediftheSGA_TARGETinitializationparameterissettoanon-zerovalue.

B.ModifyingthevalueoftheSHARED_POOL_SIZEinitializationparametertozeroisnotallowediftheSGA_TARGETinitializationparameterissettoanonzerovalue.

C.IncreasingthevalueoftheSHARED_POOL_SIZEinitializationparameterdoesnotincreasethesharedpoolcomponentsize.Itsetsthelowerlimitforthesizeofthiscomponent.

D.DecreasingthevalueoftheSHARED_POOL_SIZEinitializationparameterdoesnotreducethesizeofthesharedpoolcomponentimmediately.Itsetsthelowerlimitforthesizeofthiscomponent.

E.IncreasingthevalueoftheSHARED_POOL_SIZEinitializationparameterimmediatelyincreasesthesharedpoolcomponenttothedesiredsizebyreallocatingtheadditionalmemoryfromtheauto-tunedmemorycomponents.

F.DecreasingthevalueoftheSHARED_POOL_SIZEinitializationparameterimmediatelyshrinksthesharedpoolcomponenttothedesiredsizewhilereallocatingthereleasedmemorytothememorycomponentsthatarenotauto-tuned.


参考答案:D, E

第4题:

何谓断裂基因(split gene)?何谓重叠基因(overlapping gene)?它们在生物进化与适应上有何意义?


正确答案:重叠基因是一段能够携带多种不同蛋白质信息的DNA片段。原核生物多含重叠基因,可以保持其基因组结构的经济性,在一定的空间范围内尽可能多的表现生命功能。
断裂基因是在DNA分子的结构基因内既含有能转录翻译的片段,也含有不转录翻译的片段。真核生物多含断裂基因,可同过对非编码区的选择性剪接产生多样性的基因表达产物以完成复杂多变的生命功能。

第5题:

gene pool


正确答案: 基因库。是指一个物种所含有的总的遗传信息。基因库的数量和质量是种质资源研究不可缺少的内容。

第6题:

UsingOracleEnterpriseManagertosetSGApoolvaluesmanually,forwhichofthefollowingpoolsdoesOracleEMofferadvicetosetthevalueappropriately?()

A.DB_CACHE_SIZE

B.SHARED_POOL_SIZE

C.LARGE_POOL_SIZE

D.JAVA_POOL_SIZE

E.SGA_MAX_SIZE

F.SORT_AREA_SIZE


参考答案:A, B

第7题:

育种原始材料根据亲缘关系划分,包括()、次级基因库、和三级基因库。


正确答案:初级基因库

第8题:

YousetthevalueoftheSGA_TARGETinitializationparameterto1GtoenableOracletoautomaticallyresizemostofthememorycomponentsaccordingtothecurrentworkloadinthedatabase.Youissuethefollowingstatement:SQL>SELECTname,value,isdefault2FROMv$parameter3WHEREnameLIKE’%size%’;TheoutputofthisstatementdisplaysthattheDB_CACHE_SIZE,SHARED_POOL_SIZE,LARGE_POOL_SIZE,andJAVA_POOL_SIZEinitializationparameterscontainazerovalue.Whatdoesthisimply?()

A.TheSGA_TARGETinitializationparametercannotbesettoavaluelessthan1G

B.TheSGA_TARGETinitializationparametercannotbesettoavaluegreaterthan1G

C.TheMemoryAdvisoroftheOracleEnterpriseManager10gcannotbeusedtoobtainadviceontheimportantmemorycomponentsoftheSGA

D.ThevaluesoftheDB_CACHE_SIZE,SHARED_POOL_SIZE,LARGE_POOL_SIZE,andJAVA_POOL_SIZEinitializationparameterscannotbesetmanually.

E.NominimumlimitsareimposedontheDB_CACHE_SIZE,SHARED_POOL_SIZE,LARGE_POOL_SIZE,andJAVA_POOL_SIZEinitializationparameters.

F.TheAutomaticSharedMemoryManagementfeaturecannotbedisabledunlessyouspecifyvaluesfortheDB_CACHE_SIZE,SHARED_POOL_SIZE,LARGE_POOL_SIZE,andJAVA_POOL_SIZEinitializationparametersintheinitializationparameterfile.


参考答案:C, E

第9题:

次级基因库(gene pool2)


正确答案: 资源间的基因能转移。存在生殖隔离,杂交不实或杂种不育,须借助特殊育种手段实现基因转移。(种间或近缘野生种或近缘属)

第10题:

下列关于种群基因库的叙述中,错误的是()

  • A、一个种群所含有的全部基因叫做这个种群的基因库
  • B、种群基因库因种群的繁殖而代代相传
  • C、种群中每个个体都含有种群基因库中的全部基因
  • D、基因突变可改变基因库的组成

正确答案:C