20. In addition to seeds, which of the following characteristics is unique to the seed-
producing plants?
(A) Sporopollenin (a component of spore outer walls)
(B) Lignin present in cell walls
(C) Megaphylls
(D) Pollen
詳解 (共 2 筆)
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這是一道關於植物演化與分類特徵的生物學考...
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In addition to seeds...
阿摩線上測驗
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