“precambrian flora”的概念、定义、翻译、参考文献-科学参考

单词	precambrian flora
释义	precambrian flora Encyclopedia 理学古植物学释 precambrian flora前寒武纪植物前寒武纪（5.4亿年以前）和早古生代是藻类植物的时代。35亿年前或略早于35亿年前到大约15亿年的前寒武纪地球上只有细菌和蓝藻。它们都是原核生物。从15亿年前到寒武纪（5.4亿年前）地球上除细菌和蓝藻外，已有绿藻、红藻和褐藻。
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