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=Hayashi= 发表于 2016-4-7 00:26
可能一开始的生命都是胎生的,后来才进化衍生出卵生的动物
所以我认为先有鸡
影片的解释为
因为进化是慢慢从原始鸡进化成鸡
所以到了鸡的诞生的时候,原始鸡就会生出蛋
简单来说,是蛋先
最原始的生命是微生物,对不起,不是胎生的 lol
然后开头都是卵生的,胎生的哺乳类到了后期才出现
The history of life on Earth began about 3.8 billion years ago, initially with single-celled prokaryotic cells, such as bacteria. Multicellular life evolved over a billion years later and it's only in the last 570 million years that the kind of life forms we are familiar with began to evolve, starting with arthropods, followed by fish 530 million years ago (Ma), land plants 475Ma and forests 385Ma. Mammals didn't evolve until 200Ma and our own species, Homo sapiens, only 200,000 years ago. |
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