- Jun 4, 2013
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First you go from humans evolving into chimpanzees or guinea pigs to thinking that the ancestor of humans (lets make that vertebrates) and spiders (lets make that arthropods) was anything resembling either of them. You also are still confused on how evolution works.
Again, extant taxa do not evolve into other extant or extinct taxa. Are we clear on that?
Next, descendant species never stop being what their ancestors were. A Bovidae might evolve into a bison, buffalo or cow, but it doesn't stop being a Bovid, or mammal or amniote or vertebrate. Are we clear on that?
Finally, the common ancestor of humans and spiders was a basal bilaterian that would have looked like nothing you could imagine. It most likely would have been a tube of some sort that lived 550 million years ago and predated the Protostome/Deuterostome split. Are we clear on this?
So then we are still invertebrate, fish, amphibians and bacteria?
So then the bilaterian split to become both the spider and human? I find your belief quite unconvincing.
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