第三单元 第一章 第二节 种子植物 第1课时 种子的结构 Flashcards

1
Q

菜豆种子有哪些结构?

A

种皮、胚(胚芽、胚轴、胚根、子叶两片)

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2
Q

玉米种子有哪些结构?

A

果皮和种皮、胚乳、胚(胚芽、胚轴、胚根、子叶一片)

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3
Q

比较菜豆种子和玉米种子结构的相同点和不同点

A

①相同点:都有种皮和胚。
②不同点:菜豆种子无胚乳,营养物质贮藏在子叶里,子叶两片;
玉米种子有胚乳,营养物质贮藏在胚乳里,子叶一片。

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4
Q

胚由哪几部分组成?

A

胚包括:胚芽、胚轴、胚根、子叶四部分

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5
Q

由受精卵发育而成的幼小的生命体,是种子中最重要的部分的结构是?

A

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6
Q

我们吃的大米、面粉分别是水稻、小麦种子的哪部分?

A

胚乳

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7
Q

把玉米种子纵切,滴碘液后变为蓝色的部分是 ?

A

胚乳

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8
Q

把水稻去壳后的大米种到土里不易萌发的原因是?

A

胚被损坏

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