本帖最後由 dye 於 2010/6/29 10:34 編輯
有關膚色，基本上黑色素可以「減少紫外線的傷害」，減少癌症
但黑色素也可以妨害維他命D的製造。
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男性乳頭上，請注意男性不是一個物種。
科普雜誌 SCIENTIFIC AMERICA 有以下解釋(給他4歲的女兒)
http://www.scientificamerican.com/article.cfm?id=why-do-men-have-nipples
(簡單說，因為女性有!)
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總的來說，請你先了解何為進化論
當中你誤解了至少以下
http://evolution.berkeley.edu/evosite/misconceps/IBladder.shtml
Misconception: “Evolution is like a climb up a ladder of progress; organisms are always getting better.”
Response: It is true that natural selection weeds out individuals that are unfit in a particular situation, but for evolution, “good enough” is good enough. No organism has to be perfect. For example, many taxa (like some mosses, protists, fungi, sharks, opossums, and crayfish) have changed little over great expanses of time. They are not marching up a ladder of progress. Rather, they are fit enough to survive and reproduce, and that is all that is necessary to ensure their existence.
Other taxa may have changed and diversified a great deal—but that doesn’t mean they got “better.” After all, climates change, rivers shift course, new competitors invade—and what was “better” a million years ago, may not be “better” today. What works “better” in one location might not work so well in another. Fitness is linked to environment, not to progress.
http://evolution.berkeley.edu/evosite/misconceps/IDtrying.shtml
Misconception: “Natural selection involves organisms ‘trying’ to adapt.”
http://evolution.berkeley.edu/evosite/misconceps/IEneeds.shtml
Misconception: “Natural selection gives organisms what they ‘need.’ ”
http://evolution.berkeley.edu/evosite/misconceps/IIBcrisis.shtml
Misconception: “Evolution is a theory in crisis and is collapsing as scientists lose confidence in it.”
Response: Scientists do not debate whether evolution (descent with modification) took place, but they do argue about how it took place. Details of the processes and mechanisms are vigorously debated. Antievolutionists may hear the debates about how evolution occurs and misinterpret them as debates about whether evolution occurs. Evolution is sound science and is treated accordingly by scientists and scholars worldwide.
http://evolution.berkeley.edu/ev ... IIDincomplete.shtml
Misconception: “Evolutionary theory is incomplete and is currently unable to give a total explanation of life.”
Response: Evolutionary science is a work in progress. New discoveries are made and explanations adjusted when necessary. And in this respect, evolution is just like all other sciences. Research continues to add to our knowledge. While we don’t know everything about evolution (or any other scientific discipline, for that matter), we do know a great deal about the history of life, the pattern of lineage-splitting through time, and the mechanisms that have caused these changes. And more will be learned in the future. To date, evolution is the only well-supported explanation for life’s diversity.
http://evolution.berkeley.edu/evosite/misconceps/IIEflawed.shtml
Misconception: “The theory of evolution is flawed, but scientists won’t admit it.”
Response: Scientists have examined the supposed “flaws” that creationists claim exist in evolutionary theory and have found no support for these claims. These “flaws” are based on misunderstandings of evolutionary theory or misrepresentations of evidence. Scientists continue to refine the theory of evolution, but that doesn’t mean it is “flawed.” Science is a very competitive endeavor and if “flaws” were discovered, scientists would be more than glad to point them out. |
2010/6/28 15:33
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2010/6/29 10:57
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