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【简答题】
植物体细胞杂交可培育杂种植物,下列是某科研团队的相关实验操作,请回答下列问题: 将甲、个不同品种的植株进行杂交,首先要去掉植物体细胞的细胞壁,采用的酶是____,得到的原生质体甲和原生质体乙,然后通过人工诱导进行原生质体间的融合,通常采用的物理方法有____(写出三种)。 植物体细胞杂交的优点是克服不同生物____。 若甲细胞的基因型为Gg,乙细胞的基因型为Hh,若只考虑两两细胞融合的情况,则所获得的融合细胞基因型有____。经研究发现,在光照强度大于800lux时,只有同时存在G和H基因的细胞才能分化形成,可据此筛选出杂种细胞。进一步培养长大的植株,该植株自交后代中,继续在大于800lux的光照下培养,所长出植株的基因型为____。
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举一反三
【单选题】The dialect which is influenced by social status is
A.
regional dialect.
B.
idiolect
C.
sociolect.
D.
ethnic dialect.
【简答题】The Chinese dialects can be classified into seven large types: northern dialect (Mandarin dialect), _______________, Xiang dialect, Gan dialect, Min dialect, Hakka dialect and Cantonese.
【简答题】一般情况下,模板可分为两部分,一部分是在基于模板创建的文档中不能编辑的区域,称为( );另外一部分是在基于模板创建的文档中可以编辑的区域,称为( )。
【简答题】봉투 위에 1원짜리 우표가 5장 ( )(붙다).
【单选题】Standard dialect is ______________.
A.
designated as the official or national language of a country
B.
a dialect a child acquires naturally like his regional dialect
C.
used by people who speak different languages for restricted purpose
D.
used by people who belong to the higher social status
【单选题】Standard dialect is _____.
A.
a dialect a child acquires naturally like his regional dialect.
B.
designated as the official or national language of a country.
C.
used by people who speak different languages for restricted purpose.
D.
used by people who belong to higher social status.
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