Joe G
Posts: 12011 Joined: July 2007
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Quote (Joe G @ Dec. 15 2019,15:19) | Quote (Occam's Aftershave @ Dec. 15 2019,10:32) | Quote (Occam's Aftershave @ Dec. 15 2019,10:14) | Quote (Joe G @ Dec. 15 2019,08:14) | Quote (Occam's Aftershave @ Dec. 14 2019,23:16) | Quote (Joe G @ Dec. 14 2019,10:54) | Actual evolution says that vision systems evolved from populations of sightless organisms. That cannot be moiled [sic]. |
Derp Quote | The 'division of labour' model of eye evolution Arendt et al Phil. Trans. R. Soc. B 2009 364, 31 August 2009
Abstract: The ‘division of labour’ model of eye evolution is elaborated here. We propose that the evolution of complex, multicellular animal eyes started from a single, multi-functional cell type that existed in metazoan ancestors. This ancient cell type had at least three functions: light detection via a photoreceptive organelle, light shading by means of pigment granules and steering through locomotor cilia. Located around the circumference of swimming ciliated zooplankton larvae, these ancient cells were able to mediate phototaxis in the absence of a nervous system. This precursor then diversified, by cell-type functional segregation, into sister cell types that specialized in different subfunctions, evolving into separate photoreceptor cells, shading pigment cells (SPCs) or ciliated locomotor cells. Photoreceptor sensory cells and ciliated locomotor cells remained interconnected by newly evolving axons, giving rise to an early axonal circuit. In some evolutionary lines, residual functions prevailed in the specialized cell types that mirror the ancient multi-functionality, for instance, SPCs expressing an opsin as well as possessing rhabdomer-like microvilli, vestigial cilia and an axon. Functional segregation of cell types in eye evolution also explains the emergence of more elaborate photosensory–motor axonal circuits, with interneurons relaying the visual information. |
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Speculation based on the untestable assumption is not a model, dumbass |
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Speculation based on the untestable assumption is not a model, dumbass. There isn't any science there. And it is very telling that you can't make your case.
It is very telling that timmy can just post a paper but can't sum it up in its own words to show how it models the evolution of vision systems.
But if a "model" is just some science sounding narrative, an untested an untestable narrative based solely on imagination, then I am wrong and apparently anyone can model the evolution of anything, even a Gryphon.
-------------- "Facts are Stupid"- Timothy Horton aka Occam's Afterbirth
"Genetic mutations aren't mistakes"-ID and Timothy Horton
Whales do not have tails. Water turns to ice via a molecular code- Acartia bogart, TARD
YEC is more coherent than materialism and it's bastard child, evolutionism
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