Originally posted by 白帝 at 2006-5-4 09:26:
The color of feathers of peacock could be used to protect themselves from being caught by predators, however, it is believed that this is not the only usage of the color of feathers of peacock. In order to survive, beside themselves have to survive, another important factor is that they have to ensure that their genes could be inherited, to achieve this, some may develop distinct feather color, for example, bright white, that is the case of white peacock. And survival is not the matter of simply one generation, or present generation, the more important is the matter of how to inherit their genes of offspring.Evolution is probably due to mutation of DNA. So, first, some of the evolution may not due to the environmental advantages, but because of accidental mutation, and if teh mutation could be fixed in the population, then a new species could therefore be created. And in case of protists, they could survive well is the fact, but species derived from them could survive well is also the fact. As I have said, evolution is due to mutations, and some mutations without any advantage would be negative selected by natural selection, thus we could not say the evolutions of protists are utterly useless, and need not to do so.
孔雀羽毛的顏色能使用保護自己免受由掠食性動物被捉住, 然而, 它被相信這不是孔雀羽毛的顏色的唯一的用法。為了生存, 在他們自己旁邊必須生存, 其它重要因素是, 他們必須保證他們的基因能被繼承, 達到這, 一些也雀}發分明羽毛顏色, 例如, 明亮的白色, 是白色孔雀事例。並且生存不是簡單地一個世代問題, 或禮物世代, 更加重要問題怎樣繼承offspring.Evolution 他們的基因大概歸結於DNA 的變化。如此, 第一, 一些演變不可以由於環境好處, 而是由於偶然變化, 並且如果teh 變化能被固定在人口, 一個新種類能因此然後被創造。並且在單細胞生物的情況下, 他們能生存很好是事實, 但種類從他們被獲得能生存很好並且是事實。如同我說, 演變歸結於變化, 並且一些變化沒有任一好處會是陰性由自然選擇選擇, 因而我們不能說單細胞生物的演變是完全地無用的, 和不需要做如此。 |
[複製鏈接]
發表於 3-5-2006 17:19:22
