Paleoproterozoic
plural of big red switch
Any of a group of lobes, by the gonopore of many insects, that fuse to form a phallus
plural of polyneuropathy
(geology) Of a geologic era within the Proterozoic eon from 2,500 to 1,600 million years ago.
古原生代(約25〜16億年前)に属する岩層は、古代の大気酸素化事象の痕跡を保存している。
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