Macroevolution suggests that, over millions of years, dogs could evolve into horses. And apes (or fleas, if you believe the tabloids) could one day slowly transform into men.
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Zion noize. clever.
I don't know who this MacRoevolution fellow is, but he's fulla shit.
There ya go, reading those tabloids again. No wonder you're clueless.
There is no such thing as macro and micro evolution. There is only evolution. What you call "macro evolution" is the same thing as "micro evolution" just over a longer period of time. It is the same biological process. Since they are the same, there is no point in inventing extra words to describe that process.
A dog's ancestors will never turn into a different existing creature. Dogs have unique DNA structures that will continue to evolve but have already taken a seperate path than the DNA of other mammals, such as a horse.
But just as some small mammal evolved into a wolf and wolves evolved into dogs and dogs were then breed into hundreds of different breeds, what we now call dogs will continue to change. They will not change into something that already exists, but may change into something brand new.
Species very seldom evolve into something that already exist. Mostly they evolve into something new that has never been before.
Like when the wolf evolved into dogs, a few hundred thousand years ago. They can still interbreed, so that's speciation is very recent, evolution-wise.
A couple of million years ago there was a dog-like species (not a dog, as they are only some hundred thousand years old, remember?) that went back to the sea and evolved into dolphins, seals and whales.
It's the other way around, stupid; millions of years ago dogs and horses shared a common ancestor, as did apes, fleas and men. Apes and men are still very, very closely related, as humans are part of the Great Ape family, aka Hominidae.
Macro-evolution just suggests that when enough micro-evolutions have occurred, the resulting species are no longer able to interbreed.
That would be extremely unlikely, as both horses and dogs are local optimums, so going from one to the other would be like swimming against current, probability-wise.
Think of it like this: while one form of life may be more suitable than another, the process of going from one to the other may be locally unfeasible. It's like jumping from the bottom of a well to the bottom of a deeper well, someplace else.
Confused?
So were we! You can find all of this, and more, on Fundies Say the Darndest Things!
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