Most cave dwellers have eyes or vestiges of eyes, but if removed from the cave into lighted areas, still cannot see. Are there any studies which have been done to demonstrate that this blindness is genetic, and that if a newborn of the cave species were raised in a lighted environment, it would still remain blind? Also, have any tests been done to see if they can produce viable offspring with their light-dwelling counterparts? ie, can cave crickets mate with regular crickets or grasshoppers and have young that are fertile?
References and sources are especially important for a best answer to this question. Please qualify your answers as best as you can.
YEC's, please skip this and go to someone else who enjoys silly babble.
2007-01-21 20:18:51 · 5 answers · asked by elchistoso69 5 in Science & Mathematics ➔ Biology
Yup, this blindness is genetic. My understanding is that the genes for eyesight are lost over time and this loss is irreversible. This loss is a good example of convergent evolution, where multiple independent lineages go though the same morphological reduction. Fascinating subject, anyway.
2007-01-22 02:08:28 · answer #1 · answered by plantgirl 3 · 0⤊ 0⤋
The loss of sight is irreversable in the species. The effect varies depending on how long the creature has been underground. Cosmic caverns, a tour cave in NW Arkansas, stocked their underground lake with fish. It only took about 40 years of reproduction before the fish was permanently blind. They were still able to mate with newer fish that were not yet blind. The divission of species while logical is arbitrary, based on a difference preventing reproduction. So the answer to your question of reproduction would vary depending on the individual circumstance whether change was more rapid in vission, or reproduction. Hawaii has a few wild wallabys from Austraila which got loose in the 1800s, their blood type has changed enouph so that they are no longer able to mate with thier cousins in Australia. However, does this provde Evolution, or does the loss of sight prove De-Evolution. And what if God, to make a more perfect creation, created adaptation as a mechanism so that his creation could adapt to a changeing environment. This would only prove foresight on God's part.
2007-01-22 11:19:53 · answer #2 · answered by CaveGoat 4 · 1⤊ 0⤋
in case you place your arm in a sling for a pair of months & dont use it you will discover that it will no longer artwork the two !! no longer something to do with " evolution " ....all approximately misplaced muscle tone on your shoulder.Which ever way you look at it , evolution would not stack up! How come maximum of animals are precisely the comparable as they consistently have been eg Elephants ,Rhino , Crocodiles....each and every of the comparable , no longer something replaced ! Why ? it incredibly is purely a concept in spite of everything .
2016-12-14 09:21:43 · answer #3 · answered by ? 3 · 0⤊ 0⤋
Cells have been come to existence by symbiosis of organelles in a group. Cells, themselves, have brought to existence simple polycellular animates by co-existing beside each other. Excellent animals and plants have been come to existence by getting beside each other of these simple polycellulars. You'll read in this book how this has been done and will know that cells are not components of animals and plants, but their components are polycellular animates that were living as free in the nature in a period. In other words, animals and plants body have come to existence by symbiosis between some simple animate. This is a completely new theory and you can study its evidences inside this book.
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2007-01-25 18:55:15 · answer #4 · answered by ramin mardfar 1 · 0⤊ 1⤋
In one study, the observed the eye as it regressed.
2007-01-21 21:40:29 · answer #5 · answered by novangelis 7 · 0⤊ 0⤋