101.2(1 2無性生殖)
TRANSCRIPT
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來種植物!
101.2有性與無性 1
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生殖
101.2有性與無性 2
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101.2有性與無性 3
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種苔樂趣多!
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101.2有性與無性 5
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101.2有性與無性 6
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101.2有性與無性 7
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漂亮的花,其實是用來生殖的器官
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若把以上的繁殖分成兩大類!你會怎麼
分?
101.2有性與無性 12
A組生物 B組生物
繁殖方法的特徵 繁殖方法的特徵
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生殖方式可以這樣分
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生殖
用種子 不用種子
用孢子用根、莖、葉
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種子/營養器官或孢子
種子繁殖 營養器官或孢子繁殖
配子(精子、卵子)
後代與親代
的相似度
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動物怎麼生後代?
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101.2有性與無性 16
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101.2有性與無性 18
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她竟然死了…..
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動物的生殖也分有性和無性嗎?
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兩種生殖方式的比較
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請寫出兩種生殖方式的差異
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無性生殖舉例
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101.2有性與無性
分裂生殖
單細胞生物由一個分裂為兩個大小相等的子代,
而使個體數增加的生殖方式:如細菌,草履蟲
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101.2有性與無性
出芽生殖
單或多細胞生物,細胞分裂長出較小的芽體,芽體
長大後和母體分離獨立如酵母菌,水螅,珊瑚
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101.2有性與無性
斷裂生殖
有些生物可將身體斷裂成數段,再由這些片段,發育
成新個體;如顫藻,渦蟲,海葵
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101.2有性與無性
孢子生殖黴菌、蘚苔和蕨類等生物能產生大量的孢子。孢子
散播到適當的環境中,即能萌發成新個體
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101.2有性與無性
營養器官繁殖
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組織培養
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