EPISODE · Feb 18, 2026 · 30 MIN
2026 選修生物II CH2-2 植物營養器官-莖的篇章
from 雷比特生物空中講 · host 雷比特老師
全面探討植物「莖」在結構、功能及演化上的複雜性，糾正其常被誤解為單純支柱的觀念。文章將莖比喻為植物的「摩天大樓」與「立體交通網絡」，詳述其外部結構如節、芽、皮孔的設計哲學，並透過微觀解剖揭示了內部的維管束系統。內容詳細區分木質部（運輸水分）與韌皮部（運輸糖分）的構造與染色辨識方法，同時闡釋單子葉、雙子葉草本與木本莖的差異，特別強調次級生長（年輪與樹皮的形成）的機制。最後，概括莖在支撐、運輸、儲藏等核心功能，並介紹塊莖、鱗莖等適應環境的變態形態，證明莖是植物生存智慧的極致展現。 聽完後可以自主進行線上測驗，檢視學習成效喔~(需要登入gemini) 測驗網址 https://g.co/gemini/share/f5e8c4559289 Powered by Firstory Hosting
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2026 選修生物II CH2-2 植物營養器官-莖的篇章
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