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分析以下材料,回答问题: “海水稻”是耐盐碱水稻的俗称,相对于传统水稻能在较高盐碱浓度的水田里正常生长。 1986 年,偶然在海水短期浸泡过的土地边发现了一株带芒的水稻,从那时开始,每年一代代种植,不断对其进行繁殖、筛选,最终,选育出名为“ 86 “ 的新品种。“ 86 ” 具有很高的营养价值,同时具有不需施肥、抗病虫、耐盐碱的独特生长特性,但早期“ 86 “ 亩产比较低。 2014 年,隆平团队参与改良“ 86 ” ,通过杂交试验和选育,到 2017 年秋,海水稻最高亩产为 620.95 公斤,轰动全国。 ( 1 )水稻与玉米一样,同属子叶纲植物,水稻种子的营养主要储存在 ______ (填种子结构名称)中。海水稻能从盐碱地有选择地吸收无机盐,体现了细胞膜具有 ______ 功能。 ( 2 )从以上信息可以推断,育种工作者运用选择育种和 ______ 的方法培育出高产、耐盐碱的新品种,这是利用了生物多样性中的 ______ 多样性。 ( 3 )海水含盐率约为 3.5% ,某品种海水稻的耐盐率约为 0.8% .在大面积海水稻试验,分别采取以下方式处理该品种海水稻: I 直接利用海水灌溉; II 用淡化至 0.9% 的海水灌溉。试判断,试验后最可能出现的结果是: ______ 。 A .全部存活 B .前者全部死亡,后者可能有部分存活 C .全部死亡 D .前者全部死亡,后者必定有部分存活
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参考答案:
举一反三
【单选题】What distinguishes the end-Permian mass extinction from other similar devastations?
A.
Change of ocean chemistry.
B.
Survival of Miocidaris.
C.
Causes.
D.
Ecological reorganization.
【判断题】禁止连续操作启动开关上电 / 下电
A.
正确
B.
错误
【多选题】͟͟ 可通过溢菌现象初步确定为细菌病害。
A.
柑桔炭疽病
B.
桃细菌性穿孔病
C.
柑桔黄龙病
D.
水稻细菌性条斑病菌
E.
马铃薯青枯病
【单选题】What distinguishes an extended example from other types of examples?
A.
It is brief.
B.
It is personal.
C.
It is given in passing.
D.
It provides more details.
【单选题】What distinguishes Chinese calligraphy from other calligraphic arts?
A.
the special ink
B.
the special design
C.
the nature of Chinese characters
D.
the elasticity of the paper
【单选题】What distinguishes a hypothetical example from other types of examples?
A.
It is a specific instance.
B.
It describes an imaginary situation.
C.
It is emotionally appealing.
D.
It is a story or anecdote.
【判断题】二级引证文献就是参考文献的参考文献。
A.
正确
B.
错误
【多选题】食用菌原种的作用( )
A.
繁殖栽培种
B.
保藏菌种
C.
直接栽培出菇
D.
制作原种
【单选题】According to the professor, what distinguishes Jackson Pollock's work?
A.
The method he used for applying paint to a canvas.
B.
The location where he did his work.
C.
The widespread popularity of his style of art.
D.
The size of the paintings he produced.
【单选题】What distinguishes stem cells from other cell types?
A.
Although all cell types can divide, only stem cells differentiate after division.
B.
Stem cells are able to divide to produce populations of cells that differentiate into a related set of cells.
C.
Stem cells divide asymmetrically to give rise to one daughter cell that remains a stem cell, and a second daughter cell that differentiates into one or more cell types.
D.
Stem cells have a special type of cell division in which they form small stems that then pinch off to give rise to the daughter cell.
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