Evolution...

[Bones Senior Member Find all posts View Profile Close Bones]

ok, whilst I am reading those insane links

Another question that pops up regards to speciation, I can understand how bacteria and single celled organisms (organisms that basically duplicate themselves to reproduce) could carry on a mutation and create a new species...

But lets look at dogs, dogs can be bred into any type of dog you want, however they can all still breed with each other = variation WITHIN species, however lets say a dog does mutate and becomes a new species... what will it mate with to carry on its species? as it wont be able to mate with the species it came from...

That has got me stumped.... any explanation?

[Guest Close XitemeM]

I went to a creationist lecture at my Mum's church, and being the person I am I became super excited about it, and was convinced that it was all incredible and everything was created as it was. But then a few weeks later when I was at the library I saw a book called Darwinism vs Creationism and I thought, well if I'm after the truth and can't hide from it. I have to read this. It was very clearly argued and reasoned and evidence clearly defined. It made creationism look foolish and the case for evolution was overwhelming. So that was the end of that. It's evolution baby! It goes without saying that I became obessed with evolution after that, going as far as putting it on my resume. Hmm

[HotRod Senior Member Find all posts View Profile Close HotRod]

ok, whilst I am reading those insane links

Another question that pops up regards to speciation, I can understand how bacteria and single celled organisms (organisms that basically duplicate themselves to reproduce) could carry on a mutation and create a new species...

But lets look at dogs, dogs can be bred into any type of dog you want, however they can all still breed with each other = variation WITHIN species, however lets say a dog does mutate and becomes a new species... what will it mate with to carry on its species? as it wont be able to mate with the species it came from...

That has got me stumped.... any explanation?

I think this will answer your question better than I can:

http://scienceblogs.com/observations...speciation.php

[Bones Senior Member Find all posts View Profile Close Bones]

^^ thanks

[Bones Senior Member Find all posts View Profile Close Bones]

I think this will answer your question better than I can:

Evolution: Watching Speciation Occur : Observations of a Nerd

Nice article, clears things up!

[Cdn Senior Member Find all posts View Profile Close Cdn]

Then again, life may have travelled to this planet on a comet or other object.

Ya this is a real possibility.
We just change the problem of "how did life start on earth?" to two seperate problems,
"how did life start and where?" and "how did said life get to earth?"

Regards
Cdn

P.S I remember in my first year bio class my prof was presenting this idea, p-something. Anyway I can't remember exactly but he seemed to be suggesting without out right saying that it was more likely and it had something to do with viral genomes. If anyone knows anything about this I would like to know more because at the time I honestly didn't care enough to look into.

[itsaverage Banned Find all posts View Profile Close itsaverage]

I'm saying it doesn't really matter if it was evolution or id, it all started somewhere. Things just don't apoear. It was all God's plan and you'll never fully understand it.

[itsaverage Banned Find all posts View Profile Close itsaverage]

These two scientists performed an experiment now known as the Miller-Urey Experiment. Basically they put all the basic molecules of life (C, N, O etc.) and put them in a sealed unti with an electric spark and water. After one week, some amino acids, ribonucleotides, lipids etc. were present. These were the basic building blocks of life what was needed was a way for them to polymerize together for which there have been proposed theories that are EXTREMELY difficult to test.

The spark represented lightning strikes which would have been present on primordial earth and created a reducing enviroment (lack of excessive oxygen basically). This situation is ideal for the formation of an incredibly basic "cell" to form.

Someone suggested that clay could provide an excellent surface for polymerization of RNA and proteins (or at this point a ribozyme). Lipids were present and naturally form bilayers (cell membranes) in the presence of water.

To my knowledge the experiment has not been repeated with nearly as great of a sucess as Miller and Urey were able to achieve.

Regards
Cdn

That proves? That if you put elements of life together you can produce a cell?

[itsaverage Banned Find all posts View Profile Close itsaverage]

Let's not turn this into a circular argument. Circular arguments are not fun and nobody learns anything from them.

It's not turning it into that. It doesn't matter if you believe in evolution or id, something created the universe and the cell or human we all came from.

[itsaverage Banned Find all posts View Profile Close itsaverage]

A good question, but not one for evolution. Evolution deals with how the diversity of life occurred and how organisms went from simple to complex. The question of how life comes from non-life is abiogenesis and I believe that is a newer and less concrete science. Though I'm sure someone else will have better information on that, my knowledge of the current theories in that field is pretty shaky.

Not saying it does, was answering cdn's response dealing with the probabilities of cells evolving into what we are today and how he is an athiest.

[Messerschmidt Senior Member Find all posts View Profile Close Messerschmidt]

It's not turning it into that. It doesn't matter if you believe in evolution or id, something created the universe and the cell or human we all came from.

The universe exists and has existed for as long as we are able to study. There is no reason to go beyond that and assume anything further. It is possible that it simply spontaneously came into existence or has existed eternally. Until there is some evidence to support a theory of how the universe came to be, the only statement that you can logically make is "I don't know".