
Originally Posted by
Sharla
I look at this website and I see it saying things are invalid but not really proving anything. I haven't read it thoroughly because a lot of it is just a run down of the history of theories saying they are crap rather than actual evidence as to why. You'll have to point me in the right direction if there are particular points in that worth reading.
I don't think the theory of evolution is about how things were created but how they have evolved over time. You can believe what you like about how life was initially created but it doesn't mean it hasn't been subject to micro and macro evolution over time.
I keep reading bits and pieces about how people think that an ancient animal existing at the same time as a more recently evolved creature somehow disproves evolution.
It doesn't.
The way animals are influenced over time depends on their form, their behaviour including migration patterns and how that is or isn't suited to survival in their environment.
If their environment changes but they don't it could be that they were pretty robust in surviving different conditions in the first place. Say something like a cockroach doesn't die easily and flies reproduce so damn quickly that they are not very vulnerable.
Still if you could examine a living specimen of one of these creatures from a few thousand years ago and compare it with one existing now you'd find they probably still differed in some ways for example disease resistance, exact diet would have changed etc etc. They have evolved just in ways which are less visible.
Scientists in my lab often use rice synteny to track down the location of genes on the barley or wheat genome. They do this because the rice genome has been fully sequenced and barley and wheat have not. As rice and barley are both cereals the idea is that you get the sequence of the barley or wheat gene and find a close match in the rice genome. The genes are normally slightly different but the proteins are similar in form and function - not exactly the same but similar.
They were looking for a gene in barley and sequenced the region they expected to find it in according to the rice sequence and found that a whole segment of DNA was in a different position than they would have predicted from rice synteny. Rice is more ancient than barley and somewhere along the way a cross over and inversion event occurred. They share similar genes but in different parts of the genome, some are completely inverted which makes for a very different plant.
That's just one specific example I know of and it's not random shuffling of DNA is a specific stage in meiosis and cellular replication. Cancer is started by mutagenesis of cells. It's lethal because it makes cells function differently and it's often caused by things like UV light, radiation etc. The difference is when a person gets cancer the DNA in a differentiated cell is effected.
If a non lethal mutation occurs in an embryonic cell you have a genetically modified organism. We know cancer is common and a product of loads of environmental influences (carcinogens) so why does it seen so absurd to people to think that an embryo can't be genetically modified.
Dramatic things happen in nature like ice ages etc. If you have a population of say 2 million people and theres an ice age. Some decide to stick it out and some migrate. They eat different food as their environment changes, they have different behavioural patterns, their hormones are effected. Lets say it's a really brutal ice age, it lowers their immune system, they get a few viruses which are different in different places and wa la their populations are now down to 2 remote camps for 200 or so. Few survive and their gene pool is narrowed to particular groups with more or less body hair and tolerance to specific diets and disease - they become DIFFERENT.
It's a big change because the selection pressure is harsh for them - not necessarily all animals as some might have already been better able to tolerate the cold.
Macro evolution can just be microevolution under a harsher selection pressure.
You can still say god is behind it. No one can disprove it.
Also if you were god speaking to people thousands of years ago you'd know these people who don't even get that the earth is round yet would understand that. You'd dumb it down for them. "You'd say I created all these other things and then along you came, now I'm gonna rest for a bit and leave you to it have a nice life." - you wouldn't bother trying to explain evolution as your tool for creation would you!
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