If our world didn't have a medium for sound to pass through, or at least a medium too thin for sound to be heard by any sort of ears, would the mutation(s) that gave us ears/hearing still have come by, just being rendered useless?
I'm not asking if we'd have them today, I'm not asking about natural selection keeping them. I'm asking if the genes for ear structure and hearing would occur at all, ever.
If not, wouldn't this mean something 'guides' mutation? Why would mutations only occur when they actually have use in nature? It'd seem as if mutations knew whether or not they'd be of any use in reality. Why would whatever caused mutations relating to our sense of hearing cease to cause these mutations if there was no medium that'd allow sound waves to reach our ears?
I'm not asking if we'd have them today, I'm not asking about natural selection keeping them. I'm asking if the genes for ear structure and hearing would occur at all, ever.
If not, wouldn't this mean something 'guides' mutation? Why would mutations only occur when they actually have use in nature? It'd seem as if mutations knew whether or not they'd be of any use in reality. Why would whatever caused mutations relating to our sense of hearing cease to cause these mutations if there was no medium that'd allow sound waves to reach our ears?