I've been a Biology student. I know about comparative anatomy, comparative embryology, and other things that may suggest evolution.
What I have a problem with, though, is the idea that multiple instances of random mutation played a part in the evolution of humans. Mutations are usually harmful. How is it that most of ours happened to be beneficial and, despite some flaws (such as the flaws in our skeleton which supposedly prove that natural selection is not perfect) we turned out okay. Wouldn't we have mutated something seriously debilitating by now that would have led to our extinction long ago?
Furthermore, I've been told that a single strand of RNA + lightning equaled life. I don't get it. Aside from that, in the 1950s, an experiment was done by Stanley Miller in which the Earth's atmosphere was recreated and electricity was added, leading to some carbon atoms (abiosynthesis). Later, that experiment was disproved. What's the current theory?
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2007-01-20
15:27:53
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19 answers
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asked by
l;wksjf;aslkd
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