covering of a seed 中文意思是什麼
covering of a seed
解釋
種子外皮-
Testa the hard dry protective covering of a seed, formed from the integuments of the ovule. after fertilization the layers of the integuments fuse and become thickened and pigmented
外種皮:覆蓋在種子外部的堅硬幹燥的保護層,由胚珠的珠被發育形成。受精作用后珠被各層發生融合併加厚著色。
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