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Natural selection isn’t random. Genetic mutations are random.
Understanding evolution takes a gross simplification. Let’s say there are 100 tiny creatures.

Their genetic code causes them to glow red 80% of the time and glow green 20% of the time.

Suddenly because of an environmental change there’s a series of events which cause a 15% chance of death to a red one and a 10% chance of death to a green one. Without any genetic mutations chance of survival will be equal for all the creatures. If one has a genetic mutation for it to glow red 90% of the time it has a lower chance of survival than the others and that genetic code will be eliminated. While on the other hand one that has a 30% chance to glow green will have a higher chance of survival, maybe it will die anyways and that genetic code will be erased, but through odds eventually the surviving genetic code will favor a green glow without ever having a “design” behind it.

Macro evolution is more complex and in stages. If humans suddenly were placed into a water environment natural selection would favor people with a genetic mutation of long fingers and webbing between digits. Both of which are genetic mutations which already exist in people. In small increments this will (assuming it follows a logical path which it doesn’t always) lead to very webbed hands and long flat extended fingers.

Wow what an imagination you have!

None of it has anything to do with evolution. The plan has been in place since the beginning, and nothing will deviate from it. So few species, and such magnificent complexity; just the opposite of evolution.

Please re read before you post. I did not say natural selection was random. I said the appearance of the mutations were random. Notice your little creatures first have to have the red or green glows appear for no reason whatsoever, for the natural selection to operate and prefer one over the other.

It is that “appearance” that is so glossed over. Especially, considering that the little “glow” may be a 500 element structure and that it could not function on its own. The glow requires an operating blood supply, healing system, aspiration devices, temperature monitoring system, immune system, and four hundred other “in place” mechanisms all working in perfect harmony BEFORE the glow would even survive the first day.

Macro evolution’s main schtick is common descent. Everything came from one original organism. That, by definition, begins the skepticism about the six hundred billion interactive mechanisms which had to appear. When the probability of one of these arising is set against the need for ten thousand supporting systems all occurring within seconds of each other, or none could have survived long enough to get selected, thoughtful folks see what is being peddled.