一粒种子能够长成一株完整的植物体从种子结构分析主要是由于种子内有a种皮保护着种子b子叶或胚乳中储存着营养物质c�育成熟而完整的胚d Template




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tomski一粒种子能够长成一株完整的植物体从种子结构分析主要是由于种子内有a种皮保护着种子b子叶或胚乳中储存着营养物质c�育成熟而完整的胚d coloring