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:Part of the 'two-edged sword' of natural selection is that it should weed out inefficiencies as an outgoing occurrence and if it's not doing so, then they aren't inefficiencies. Giving it an open ended "in the process" can be fine if we're talking about short time periods on an evolutionary scale, but when we're talking about tens of millions of years then there is a benefit or a neutrality to the structure that by definition says it is not useless. [[User:Learn together|Learn together]] 19:45, 23 May 2007 (EDT)
:Part of the 'two-edged sword' of natural selection is that it should weed out inefficiencies as an outgoing occurrence and if it's not doing so, then they aren't inefficiencies. Giving it an open ended "in the process" can be fine if we're talking about short time periods on an evolutionary scale, but when we're talking about tens of millions of years then there is a benefit or a neutrality to the structure that by definition says it is not useless. [[User:Learn together|Learn together]] 19:45, 23 May 2007 (EDT)
::If the structure is neutral from the point of reproductive and general fitness, then there is no selective pressure for it to be eliminated and it could potentially persist until random mutations eliminate or change it. [[User:GodWarrior|GodWarrior]] 21:06, 23 May 2007 (EDT)