Greetings and peace be with you chalks75;
You have answered the first question.
I can understand this would have to happen if TeO was a fact.
You have described eyes in a number of species, but you have not given the science of how eyes evolved from no eye. Whether the eye evolved in one species or a hundred, it still had to start from 'no eye'. If you apply critical thinking to your reply; it falls to pieces.
Nilsson Pelger's model of eye evolution only states that it could take 1,800 incremental stages for the lens to evolve. If the fish evolved in the way Nilsson Pelger described the fish would still be blind. The lenses on their own are useless, so natural selection would not have worked.
My glasses have two perfectly good lenses. If I am blindfolded and put in a strange room with my perfectly good glasses on my head, I am blind, my good lenses are useless.
I started this thread in the hope that the science would become clear.
In the spirit of searching for God,
Eric
Scientists think the earliest version of the eye was formed in unicellular organisms, who had something called ‘eyespots’. These eyespots were made up of patches of photoreceptor proteins that were sensitive to light. They couldn’t see shapes or colour, but were able to determine whether it was light or dark out. These unicellular organisms would use photosynthesis to create food for themselves, so being able to determine where the most light was coming from created a huge advantage for them.
Over time, the unicellular creature would evolve, and its eyespot evolved along with it. Scientists believe a depression formed around the light sensitive spot, creating a pit that made it’s ‘vision’ a little sharper. Eventually, the pit’s opening could have gradually narrowed, creating a small hole that light would enter, much like a pinhole camera. From there, a retina would develop, as well as a lens at the front of the eye. Over millions of years, small changes that confer a survival advantage would chance a simple light-sensitive structure to the complex eyes we have now.
Scientists make these assumptions about how the eye evolved because eyes corresponding stages in this sequence have been found in species that exist today.
A Single Source
As eyes were evolving from crude, light-sensitive, cups to more complex systems, the Earth was also undergoing dramatic changes. A complex interplay of environmental changes were setting the stage for large, active creatures to evolve. And they did just that, this outburst of speciation is now known as the Cambrian explosion. It was during this time that some eyes became more complex and specialized. They began to take on different shapes and colours.
Due to the diversity of eye types around the world, scientists used to believe that eyes had many independent origins. Advances in technology helped us learn more about the molecular structure of eye, and showed that proteins known as opsins are the foundation of all eyes in all creatures. This commonality confirms that all organisms with eyes, at one point, shared a common ancestor.
