10. Megaphylls evolved from:
(A) microphylls that became more elaborate due to hormonal interactions.
(B) enations that became vascularized.
(C) spines that became vascularized.
(D) three-dimensional branching systems that became planated and webbed.
(E) the elaboration of ligules.
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1. 題目解析 本題問的是巨葉（meg...
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