Eyes are often used in arguments for intelligent design because many consider this organ to be too complex to have evolved by chance alone. However, complex lensed eyes evolved independently both within cephalod mollusks and vertebrates including our own ancestor. In the evolution of these structures the corresponding phylogenies revealed that both: A) were preceded by the evolution of 'simple' light sensing eyes, thus having adaptive intermediate evolutionary steps. B) lacked intermediate evolutionary steps involving the evolution of 'simple' eyes. C) had intermediate evolutionary steps, but ultimately the vertebrate eye had a superior 'design' without any kind of blind spot, relative to the simple invertebrate cephalopod eye. D) were preceded by vestigial non-functional optic structures.
Eyes are often used in arguments for intelligent design because many consider this organ to be too complex to have evolved by chance alone. However, complex lensed eyes evolved independently both within cephalod mollusks and vertebrates including our own ancestor. In the evolution of these structures the corresponding phylogenies revealed that both:
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A) were preceded by the evolution of 'simple' light sensing eyes, thus having adaptive intermediate evolutionary steps. |
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B) lacked intermediate evolutionary steps involving the evolution of 'simple' eyes. |
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C) had intermediate evolutionary steps, but ultimately the vertebrate eye had a superior 'design' without any kind of blind spot, relative to the simple invertebrate cephalopod eye. |
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D) were preceded by vestigial non-functional optic structures. |
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