生命起源于原始海洋的证据

发布时间:2015-10-17 20:53:43   来源:文档文库   
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生命起源于原始海洋的证据

摘要:生命的起源一直是科学家们研究的课题。水是生命的重要组成部分,海水的庇护又能有效防止紫外线对生命的杀伤。大约在45亿年前,地球刚刚形成时是一个大火球,大约在35亿年前地球冷却下来并形成了原始的海洋,当时的陆地上一片荒芜,在咆哮的海洋中却开始孕育生命--最原始的细胞,其结构和现代细菌很相似。大约几亿年的进化,海洋中原始细胞逐渐演变成为原始的单细胞藻类,又经过数亿年的演化成了如今的生物界。从现在的基因组学、胚胎学、还有生物原生质的盐浓度与原始海水接近等证据都表明生命起源于原始海洋。

关键词:原始海洋原始的细胞 基因组 生物界

Abstract: the origin of life has been the scientists of research. Water is an important part of life, and the sea asylum and can effectively prevent ultraviolet ray to the life the damage. About 4.5 billion years ago, earth had just formed is a ball of fire, almost 3.5 billion years ago the earth cooled down and formed the original ocean, at the time, the land was desolate, in the ocean of roaring did start-the most primitive gives life of cells, its structure and modern bacteria are quite similar. About billions of years of evolution, ocean primitive cells gradually evolved into the original single-celled algae, again through hundreds of millions of years of evolution became today’s nature. From the current genomics, embryology, and biological protoplasm concentration of salt and water such as close to the original evidence showed that life originates in the ocean.

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