如图为花的结构简图，请据图填空：（1）写出花的各部分的名称．①
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（1）由图可知：1是花药、2是花丝、3是雄蕊、4是柱头、5是花柱、6是子房、7是雌蕊、8是花瓣、9是萼片、10是花托、11是花梗（2）在观察花的结构时，要用镊子从外向内依次摘下萼片、花瓣、雄蕊和雌蕊．
（3）在花的结构中，雄蕊和雌蕊与果实和种子的形成有直接关系． 雄蕊可以产生精子，雌蕊中有子房和胚珠，胚珠内有卵细胞．果实和种子的形成必须要经过传粉和受精两个生理过程，没有雄蕊和雌蕊就不能完成这两个生理过程，也不能形成果实和种子．
（4）传粉受精完成以后，子房发育成果实，子房壁发育成果皮，胚珠发育成种子，珠被发育成种皮，受精卵发育成胚，受精极核发育成胚乳．
故答案为：（1）1是花药；2是花丝；3是雄蕊；4是柱头；5是花柱；6是子房；7是雌蕊；8是花瓣；9是萼片；10是花托．（2）萼片；花瓣；雄蕊．（3）雄蕊；雌蕊；果实；种子．（4）果皮；种子；受精卵；果实．
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