第三单元 第二章 第三节 开花和结果 Flashcards

1
Q

一朵完整花的基本结构

A

花柄、花托、萼片、花瓣、雄蕊、雌蕊

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2
Q

花的主要结构

A

雄蕊和雌蕊

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3
Q

雄蕊由哪两部分组成?

A

花药和花丝

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4
Q

雌蕊由哪三部分组成?

A

柱头、花柱和子房

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5
Q

什么是传粉?

A

花药成熟后自然裂开,散放出花粉。花粉从花药落到雌蕊柱头上的过程,叫做传粉。

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6
Q

什么是受精?

A

胚珠里的卵细胞,与来自花粉管中的精子结合,形成受精卵的过程。

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7
Q

被子植物的双受精作用

A

一粒花粉中有两个精子,一个与卵细胞结合形成受精卵;另一个与极核结合形成受精极核。

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8
Q

子房发育成?

A

果实

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9
Q

子房壁发育成?

A

果皮(果肉也属于果皮)

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10
Q

胚珠发育成?

A

种子

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11
Q

珠被发育成?

A

种皮

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12
Q

受精卵发育成?

A

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13
Q

受精极核发育成?

A

胚乳

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