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EvC Forum ⇒ Science Forums ⇒ Biological Evolution ⇒

Can sense organs like the eye really evolve?

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Author Topic:   Can sense organs like the eye really evolve?
Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002

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Message 9 of 242 (636423)
10-06-2011 12:23 PM 		Reply to: Message 1 by ANI
10-06-2011 8:39 AM

Hi, ANI!!
Welcome to EvC!
​
You ask, "Can sense organs like the eye really evolve?"
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Well, they DID - we see them all around us in the animal kingdom, in a couple of dozen configurations. So the answer must be, "yes, they can."
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Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002

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Message 38 of 242 (636559)
10-07-2011 2:40 PM 		Reply to: Message 23 by Robert Byers
10-06-2011 10:23 PM

if there is a single blueprint from a single thinking mind then all eyes are the same equation with a few differences.
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Trilobite eyes were compound eyes with freakin' crystalline calcite lenses. That seems more than a little different from mammal eyes - single with protein-water lenses. You are Making Shit Up as usual, Robert.
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Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002

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Message 67 of 242 (636856)
10-11-2011 2:41 PM 		Reply to: Message 66 by Blue Jay
10-11-2011 2:33 PM

So, from what I can gather, I don't see how we could realistically expect anything from the fossil record in regards to the evolution of eyes.
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Trilobite eyes, or at least their lenses, excepted: they are mineralized from the get-go, being made of calcite. Vertebrate eyes are noticeably squishier.
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