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21. Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that
(A) extant terrestrial arthropods are better adapted to terrestrial life than are extant terrestrial vertebrates.
(B) arthropods evolved before vertebrates did.
(C) vertebrates evolved from arthropods.
(D) arthropods have had more time to co-evolve with land plants than have vertebrates.
(E) ancestral arthropods must have been poorly adapted to aquatic life, thus experienced a selective pressure to invade land.

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 【站僕】摩檸Morning：有沒有達人來解釋一下?
倒數 2天 ,已有 1 則答案
Misa 大一上 (2021/03/17):

節肢動物入侵陸地大約一億年前，而脊椎動物尚未入侵。這最明顯地暗示著

（A）現存的陸生節肢動物比現存的陸生脊椎動物更好地適應陸生生物。

（B）節肢動物先於脊椎動物進化。

（C）從節肢動物進化而來的脊椎動物。

（D）節肢動物比陸地動物有更多的時間與陸地植物共同進化。

（E）祖先節肢動物必須適應水生生物，因此經歷了入侵土地的選擇性壓力。

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21. Arthropods invaded land about 100 mi..-阿摩線上測驗