天气预报15天查询> 自然> 花发育成果实的四个步骤

花发育成果实的四个步骤

更新时间: 2021-06-02 19:36:16     

1、一般情况下,植物要结出果实,需依次经过开花、传粉、受精、以及果实和种子的形成四个阶段。

2、受精完成后,受精的卵细胞发育成胚,受精的极核发育成胚乳,珠被发育成种皮、胚珠发育成种子,子房壁发育成果皮,子房发育成果实。

关键词: 发育 果实 步骤

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-3473397/ | 耗时:0.0894 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=3473397 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3473397 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3473397 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(383167,2999290,765978,404387,719684,693815,686559,633110,619631,2435329,382220,762635,822494,501839,445613,673076,805871,545633,374981,1100638,658734,697577,674217,989564,749214,3505553,726111,456184,1001207,655293) ORDER BY field (ArticleID,383167,2999290,765978,404387,719684,693815,686559,633110,619631,2435329,382220,762635,822494,501839,445613,673076,805871,545633,374981,1100638,658734,697577,674217,989564,749214,3505553,726111,456184,1001207,655293)