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Author Topic:   Has natural selection really been tested and verified?
Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


Message 32 of 302 (536395)
11-22-2009 5:24 PM
Reply to: Message 31 by Bolder-dash
11-22-2009 12:59 PM


So ... you don't actually want to discuss natural selection? Only in your OP you said that you did.

This message is a reply to:
 Message 31 by Bolder-dash, posted 11-22-2009 12:59 PM Bolder-dash has replied

Replies to this message:
 Message 34 by Bolder-dash, posted 11-22-2009 9:04 PM Dr Adequate has replied

Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


Message 53 of 302 (536560)
11-24-2009 12:13 AM
Reply to: Message 34 by Bolder-dash
11-22-2009 9:04 PM


This is a discussion about natural selection including the mutations that are necessary to drive the selection.
But natural selection does not include the mutations --- you might as well say: "This is a discussion of apples, including oranges". Nor is it correct to say that mutations "drive the selection".

This message is a reply to:
 Message 34 by Bolder-dash, posted 11-22-2009 9:04 PM Bolder-dash has replied

Replies to this message:
 Message 59 by Bolder-dash, posted 11-24-2009 4:40 AM Dr Adequate has replied

Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


Message 54 of 302 (536561)
11-24-2009 12:24 AM
Reply to: Message 7 by slevesque
11-21-2009 2:21 PM


A better question would be, if natural selection's little brother sexual selection has been tested. I would find that more interesting (because I think we all agree natural selection is a real thing and that it has been tested)
There's the experiments that have been done on guppies: these might interest you. The markings on guppies are subject to natural and sexual selection. When guppies are subject to strong predation, they evolve to match the background --- with fine spots on a finely stippled background, and coarser spots on a coarser background. But when predation is not much of a factor, the male guppies evolve to become more conspicuous, helping them to attract females.
Some details here and here, or just google on guppies and natural selection.
Edited by Dr Adequate, : No reason given.

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Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


Message 57 of 302 (536570)
11-24-2009 1:55 AM
Reply to: Message 55 by ICANT
11-24-2009 1:17 AM


Re: The evolutionary two-step
It is assumed that the 13 species on the Galapagos came from one species over millions of years.
But on Cocos Island there is and has been only one species they did not spectate in the same amount of time. Why is that?
Ooh, could it be that there are eighteen Galapagos islands and only one Coscos island?
So what evolutionary changes does this oscillating back and forth bring about?
That is the evolutionary change.

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Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


(1)
Message 60 of 302 (536603)
11-24-2009 7:52 AM
Reply to: Message 59 by Bolder-dash
11-24-2009 4:40 AM


No, your reply is stupid. In fact many of your replies (most, as I have seen) have nothing to say, other than trying to express your own brand of not very interesting glibness.
And, of course, trying to teach you the very meaning of the words you're throwing about.
A simple "thank you" would have sufficed
Natural selection must choose from a variety of different genetic groups.
And this "choice" is natural selection. The origin of the variation is mutation.
For instance, if you wish to explain how an eye developed through natural selection-please include the entire process. I would be very interested.
It developed through natural selection acting on mutations.
There are two aspects to evolution --- variation and selection. These are distinct in much the same way that the engine of a car is distinct from its steering wheel.
If you wish to discuss evolution at all it is essential that you grasp this very simple distinction.

This message is a reply to:
 Message 59 by Bolder-dash, posted 11-24-2009 4:40 AM Bolder-dash has replied

Replies to this message:
 Message 61 by Iblis, posted 11-24-2009 8:34 AM Dr Adequate has not replied
 Message 62 by Bolder-dash, posted 11-24-2009 9:05 AM Dr Adequate has not replied
 Message 63 by Bolder-dash, posted 11-24-2009 9:06 AM Dr Adequate has replied

Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


(1)
Message 66 of 302 (536626)
11-24-2009 10:38 AM
Reply to: Message 63 by Bolder-dash
11-24-2009 9:06 AM


Well, now I am confused.
Evidently.
I only asked you about natural selection forming an eye, and then you go and bring bring mutations into the discussion.
Yeah, you're very confused.
I thought we were just talking about natural selection.
No, when you start talking about mutation, or about the evolution of the eye, you're not "just talking about natural selection".
---
You seem to be trying to whine about how I've gone off-topic by pointing out to you how you've gone off-topic. I cannot help but wonder whom you are trying to impress.
Edited by Dr Adequate, : No reason given.

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 Message 63 by Bolder-dash, posted 11-24-2009 9:06 AM Bolder-dash has not replied

Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


(1)
Message 71 of 302 (536676)
11-24-2009 12:59 PM
Reply to: Message 67 by Bolder-dash
11-24-2009 11:34 AM


I quoted him exactly, I can't help it if you can't read that. My response to him was sarcasm. Do you know what that is?
I asked him to explain how an eye is made through natural selection, and his response was "it developed through natural selection acting on mutations." That was a verbatim quote!
So why did he mention mutations when I didn't even ask that?
Be ... cause ... you ... asked ... a ...bout ... the ... e ... vo ... lu ... tion ... of ... the ... eye.
This involves mutation.
It's like you're complaining: "Why did he say "four" when I asked what two plus two was! I didn't even mention four! This thread is about the number three!"
To use his lame attempt at analogies, its like talking about a car, but not being able to talk about its engine.
It's like if in a thread about steering wheels you asked me how my steering wheel could transport me from Arizona to Nevada and then whined incoherently when I disabused you of your ridiculous mistake by mentioning the other parts of the car.
Now, I see we can add guppies oscillating between having spots and not having spots to our slowly growing list of tests to prove natural selections ability to create evolutionary change.
You may have managed to misunderstand the links that I provided, possibly by the cunning expedient of not actually reading them.
I am not really sure how showing species employing the exact same survival method on and off again shows that ...
Apparently there are many things that you don't see. How fortunate it is that biologists do not share your disabilities.
Edited by Dr Adequate, : No reason given.
Edited by Dr Adequate, : No reason given.

This message is a reply to:
 Message 67 by Bolder-dash, posted 11-24-2009 11:34 AM Bolder-dash has not replied

Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


Message 184 of 302 (537295)
11-28-2009 5:02 AM
Reply to: Message 183 by Bolder-dash
11-28-2009 4:37 AM


Re: Speciation
Now go read a biology book ...
A response to your post that needs nothing adding to it.

This message is a reply to:
 Message 183 by Bolder-dash, posted 11-28-2009 4:37 AM Bolder-dash has not replied

Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


Message 185 of 302 (537296)
11-28-2009 5:05 AM
Reply to: Message 182 by Bolder-dash
11-28-2009 4:06 AM


Re: Back to Basics
No only does that not relate to any conceivable evolutionist reply to Peg's post, it doesn't relate to Peg's post either.
If you want to debate with the imaginary people who live in your head, may I suggest that this is not the best place to do so?

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 Message 182 by Bolder-dash, posted 11-28-2009 4:06 AM Bolder-dash has replied

Replies to this message:
 Message 193 by Bolder-dash, posted 11-28-2009 6:17 AM Dr Adequate has replied

Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


Message 186 of 302 (537298)
11-28-2009 5:10 AM
Reply to: Message 176 by ICANT
11-28-2009 12:19 AM


Re: Back to Basics
It shows 14 different species of finches that have different size beaks and during wet times the small beak finches increase in number and the large beak finches decrease in number. In dry times the large beak finches increase in number and the small beak finches decrease in number.
Now if that is evolution I am sold.
It's evolution: it's a change in the composition of the gene pool. It's not the evolution on the scale that creationists turn blue in the face trying to deny, but that doesn't stop it from being evolution.
In that it can be shown to be adaptive (and because we know that Lamarck was wrong) it is also natural selection in action.

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 Message 176 by ICANT, posted 11-28-2009 12:19 AM ICANT has not replied

Replies to this message:
 Message 188 by Peg, posted 11-28-2009 5:18 AM Dr Adequate has replied

Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


Message 189 of 302 (537305)
11-28-2009 5:40 AM
Reply to: Message 188 by Peg
11-28-2009 5:18 AM


Re: Back to Basics
why do they call it 'evolution' and not some other term which more accuarately describes the adaptation of the finchs to a changed environment?
Evolution is the accurate term. There is no "more accurate" term.
It would appear that, like many creationists, you would like the term "evolution" to refer only to the things that you want to deny.
There are two reasons why this is not going to happen. The first is that creationists don't get to change the language of science to suit their whims. And the second is that even if you did, you guys can't agree on what it is that you want to deny.
Edited by Dr Adequate, : No reason given.

This message is a reply to:
 Message 188 by Peg, posted 11-28-2009 5:18 AM Peg has replied

Replies to this message:
 Message 190 by Peg, posted 11-28-2009 5:44 AM Dr Adequate has replied

Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


Message 191 of 302 (537312)
11-28-2009 5:59 AM
Reply to: Message 190 by Peg
11-28-2009 5:44 AM


Re: Back to Basics
well then that explains why we creationist get all hot and bothered about the term 'evolution'
its change has been so subtle over the years that we think of it in its original form, namely darwinian evolution of the species.
That's still what it means.
The finch species under discussion was, patently, evolving.
Perhaps if the new format was publicised and explained about how it is different to its original meaning, we'd be more accepting of the term.
Now you are pretending that the meaning creationists want the word to have is its original meaning.
No, it isn't.
As to the actual meaning of the word being "publicized", you can see its actual use in biology textbooks, in scientific papers, and on discussion boards such as this one. The only people using it inaccurately are creationists, and short of hunting down and killing anyone who uses it inaccurately, I don't see what evolutionists are meant to do about this.
Evolution is any heritable change to a lineage. Not any such change that creationists want to deny has happened --- just any such change.

This message is a reply to:
 Message 190 by Peg, posted 11-28-2009 5:44 AM Peg has replied

Replies to this message:
 Message 192 by Bolder-dash, posted 11-28-2009 6:08 AM Dr Adequate has not replied
 Message 196 by Peg, posted 11-28-2009 6:40 AM Dr Adequate has replied

Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


Message 200 of 302 (537329)
11-28-2009 6:53 AM
Reply to: Message 193 by Bolder-dash
11-28-2009 6:17 AM


Re: Back to Basics
Man what a dimwit you are. You interpreted that entire post to be a parody of an argument an evolutionist would make.
No, I interpreted it as not relating to Peg's post, or to any conceivable evolutionist reply to Peg's post.
Which is what I said.
Hahaha
It was an exaggeration of the exact issues that an evolutionist would NEVER address you complete fool! You don't even know how to make a proper insult you twit! At least you are UNINTENTIONALLY funny! ha ha ha...
If you wish to pretend that there are "issues that an evolutionist would NEVER address" then I await your further elucidation of this point with a mixture of interest, pity, and contempt.
But if, as I suspect, this nonsense has nothing to do with the topic of this thread, then I suggest that you start another one.
Edited by Dr Adequate, : No reason given.

This message is a reply to:
 Message 193 by Bolder-dash, posted 11-28-2009 6:17 AM Bolder-dash has not replied

Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


(1)
Message 202 of 302 (537331)
11-28-2009 7:00 AM
Reply to: Message 199 by Peg
11-28-2009 6:52 AM


Re: Back to Basics
Im sure i dont need to explain it to you but just to check that i have the right idea, its the sudden jump into new species rather then the very slow process of adaptive evolution.
* sigh *
No, you don't have the right idea.
Punctuated equilibrium is the notion that, as Darwin put it:
The period during which each species underwent modification, though long as measured by years, was probably short in comparison with that during which it remained without undergoing any change.

This message is a reply to:
 Message 199 by Peg, posted 11-28-2009 6:52 AM Peg has not replied

Dr Adequate
Member (Idle past 310 days)
Posts: 16113
Joined: 07-20-2006


(1)
Message 205 of 302 (537337)
11-28-2009 7:28 AM
Reply to: Message 196 by Peg
11-28-2009 6:40 AM


Re: Back to Basics
What did they evolve into?
A population with an average small beak size evolved into a population with an average large beak size.
and why did the research of Peter Grant and Lisle Gibbs see a reversal of that 'evolution' when the climate changed. They found that the beaks of later generations changed again and again going from large beaks to small depending on the climate.
Of course. Evolution doesn't suddenly throw its hands up and say: "Oh, the climate's just dicking me about now, why can't it make up its mind? ... I give up."
the finches were still finches weren't they?
Of course. But as I've pointed out, "evolution" does not mean "that degree of evolution that creationists deny is possible".
The fact that the observations don't contradict creationist dogma doesn't stop them from being observations of evolution.
but surely you can see how this is quite different from Darwin who went beyond small observable changes. He wrote that all the millions of species alive were the descendants of just a few creatures.
He did. That's the principle of common descent, which is what creationists actually object to.
He said they slowly evolved by extremely slight modifications.
And that's the (his first sketch of) the theory of evolution, which is another thing again.
you are speaking about one very small part of a bigger picture. Creationists are looking at the bigger picture.
Well, let's run with your analogy. Suppose there was some bunch of people who denied that it was possible for one human (in this case, Michaelangelo) to have painted the ceiling of the Sistine chapel --- the big picture. Well, we could debate that. But suppose they wanted to redefine the word "painting" to mean "painting the ceiling of the Sistine chapel". So then they go around saying "Painting is impossible". Then when I pick up a paintbrush and apply paint to a surface, and say: "Look, painting!" they complain that that's not what they meant. Well, it may not be, but it's what "painting" means.
Edited by Dr Adequate, : No reason given.

This message is a reply to:
 Message 196 by Peg, posted 11-28-2009 6:40 AM Peg has replied

Replies to this message:
 Message 207 by Peg, posted 11-28-2009 8:01 AM Dr Adequate has replied
 Message 215 by ICANT, posted 11-28-2009 8:48 AM Dr Adequate has replied

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