Does natural selection explain the origin of the eyeball, or was it a mutation?
Would a mutation happen in a group of organisms at about the same time? Did DNA for an eyeball exist before any organism actually had an eyeball?
- Anonymous11 months agoFavourite answer
Of course not. A fish egg is still a fish egg; a chicken egg is still a chicken egg; horse spermatazoa is still horse spermatazoa.
Do you think the one who made the eye doesn't see?
Do you think the one who made the ear doesn't hear?
These trees were buried by tsunami waves; the mud engulfed them, burying them upright.
Under the forces of extreme pressure minerals in the sediment turned them to stone.
*Stone cannot be dated.*
Once around the sun = one year.
You can't hold up a rock and tell us how many times it has travelled around the sun:
it does not 'age'.
Every fossil that exists on the planet was created during the world-wide flood.
That's why there are clam fossils on the top of Mt. Everest.
Want to see evolution?
God can raise children for Abraham from the stones if He wants... He doesn't need any of us (but He wants us).
- Anonymous11 months ago
Mutations are not only random. Stored information has an effect on not only gene expression, but also gene modification. The env. was such that there was a need for an eyeball, the DNA reacted to that information and changed as a result.
- Gray BoldLv 711 months ago
Yes, it does. The ability to avoid or recover from predation often makes the difference between life and death, and is therefore one of the strongest components of natural selection. One of the many hypotheses for "causes" of the Cambrian explosion is the "Light Switch" theory of Andrew Parker: It holds that the evolution of eyes started an arms race that accelerated evolution. Before the Cambrian explosion, animals may have sensed light, but did not use it for fast locomotion or navigation by vision. The rate of eye evolution is difficult to estimate, because the fossil record, particularly of the lower Cambrian, is poor. How fast a circular patch of photoreceptor cells can evolve into a fully functional vertebrate eye has been estimated based on rates of mutation, relative advantage to the organism, and natural selection. However, the time needed for each state was consistently overestimated and the generation time was set to one year, which is common in small animals. Even with these pessimistic values, the vertebrate eye would still evolve from a patch of photoreceptor cells in less than 364,000 years.
- CowboyLv 611 months ago
Eyes required hundreds of mutations - more like thousands over the course of millions of years. And yes, evolution explains it quite well.
Evolution of eyes
Evolution of Phototransduction, Vertebrate Photoreceptors and Retina
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- Mr. SmartypantsLv 711 months ago
Evolution through natural selection REQUIRES mutation to work! If a mutation enhances an animal's chances of survival, it's more likely to be passed on to the next generation. If there were no mutations, evolution would not move forward.