Two of everything..

Debate and discussion of any biological questions not pertaining to a particular topic.

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angelo
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Two of everything..

Post by angelo » Tue Dec 20, 2005 12:31 am

Why do many organs/structures come in twos? And where in the course of evolution did 'twoness' appear?

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Mjhavok
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Post by Mjhavok » Tue Dec 20, 2005 2:45 am

the organs of which you have two kidney, lung etc are more efficient than one and I suspect this is one reason, another would be for backup purposes, for instance if one gets damaged you don't die as it can be removed.
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MrMistery
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Post by MrMistery » Tue Dec 20, 2005 8:37 pm

Yes, that is mainly the reason. For example you can function fine with only one kidney. Guess it simply was better to have a backup...
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

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mith
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Post by mith » Tue Dec 20, 2005 10:12 pm

Now, the question is how they evolved in twos :)
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chicoguardian
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Post by chicoguardian » Wed Dec 21, 2005 1:13 pm

life like us back in the early ages probebly started like this after they were micro-organisms evolving into beings
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MrMistery
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Post by MrMistery » Wed Dec 21, 2005 6:27 pm

They evolved in twos just like some evolved in unos. Haven't you heard of people with genetic mutations that had more than one liver etc? I even saw a baby that had 2 penises(disturbing...). By natural selection they stayed that way
This is my opinion of course, i can't actually prove it
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

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