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Author Topic:   Peanut Gallery for the debate between mindspawn and RAZD
xongsmith
Member
Posts: 2587
From: massachusetts US
Joined: 01-01-2009
Member Rating: 6.4


Message 46 of 55 (691118)
02-20-2013 12:21 PM
Reply to: Message 43 by Pressie
02-20-2013 6:36 AM


Re: Evolution of multicellular organisms
Pressie finds:
I stumbled across the article Multicellular Life Evolves in Laboratory.
I thought it is of interest in this debate.
From there I get the following:
quote:
This is actually simple. It doesn’t need mystical complexity or a lot of the things that people have hypothesized special genes, a huge genome, very unnatural conditions, said evolutionary biologist Michael Travisano of the University of Minnesota, co-author of a study Jan. 17 in the Proceedings of the National Academy of Sciences.
Actually, the more I think about it, it's unicellular life that is weird. We see mitosis in 1-celled life. Why do they split into 2 cells and then split apart into 2 organisms? Seems they would hang together for awhile afterwards, no? Or at least significantly often enough to produce multicellular organisms. You can define your own incredulity in your own words, but what happens happens.
funny note: when i type "multicellular" it gets flagged as spelled wrong and suggests "unicellular". LOL

- xongsmith, 5.7d

This message is a reply to:
 Message 43 by Pressie, posted 02-20-2013 6:36 AM Pressie has replied

Replies to this message:
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 Message 52 by Pressie, posted 02-20-2013 11:08 PM xongsmith has seen this message but not replied

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


Message 47 of 55 (691131)
02-20-2013 1:40 PM
Reply to: Message 44 by Bolder-dash
02-20-2013 7:53 AM


Re: Evolution of multicellular organisms
Maybe the article should have been retitled to say: "Darwinism is wrong-life doesn't proceed in complexity through gradual, slow, progressive mutations."
No it shouldn't: because biologists, the people who know about biology, don't recite witless meaningless nonsense made up by creationists, the people who don't know about biology.
Edited by Dr Adequate, : No reason given.
Edited by Dr Adequate, : No reason given.

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Taq
Member
Posts: 10073
Joined: 03-06-2009
Member Rating: 5.2


Message 48 of 55 (691138)
02-20-2013 3:16 PM
Reply to: Message 46 by xongsmith
02-20-2013 12:21 PM


Re: Evolution of multicellular organisms
Actually, the more I think about it, it's unicellular life that is weird. We see mitosis in 1-celled life. Why do they split into 2 cells and then split apart into 2 organisms? Seems they would hang together for awhile afterwards, no?
Some do hang out together. There are bacteria that grow in chains, in twos, and even in cubes. On top of that, you also have bacteria like myxococcus that form multicellular fruiting bodies as well as biofilm production through cross species cooperation.
Bacteria also have sex. Here is a bit of bacteria porn for you:

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


Message 49 of 55 (691143)
02-20-2013 4:33 PM
Reply to: Message 43 by Pressie
02-20-2013 6:36 AM


Re: Evolution of multicellular organisms
Would my interpretation of that research be correct?
Broadly, yes. That's why it's provoked a creationist to puke halfwitted nonsense at you.
Edited by Dr Adequate, : No reason given.

This message is a reply to:
 Message 43 by Pressie, posted 02-20-2013 6:36 AM Pressie has replied

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Pressie
Member
Posts: 2103
From: Pretoria, SA
Joined: 06-18-2010


Message 50 of 55 (691159)
02-20-2013 10:58 PM
Reply to: Message 44 by Bolder-dash
02-20-2013 7:53 AM


Re: Evolution of multicellular organisms
Well, from my field, it seems as if this process took billions of years in nature. That's from the empirical, verifiable evidence we have in the form of those fossils we find in those wonderful rocks.
I don't think anybody with half a brain would call a process that took billions of years to happen saltation.
Edited by Pressie, : No reason given.

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Pressie
Member
Posts: 2103
From: Pretoria, SA
Joined: 06-18-2010


Message 51 of 55 (691161)
02-20-2013 11:03 PM
Reply to: Message 44 by Bolder-dash
02-20-2013 7:53 AM


Re: Evolution of multicellular organisms
bolderdash writes:
Maybe the article should have been retitled to say: "Darwinism is wrong-life doesn't proceed in complexity through gradual, slow, progressive mutations."
Luckily for the progress of humanity that's not what biologists claim about the theory of evolution at all.
You made that up.

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Pressie
Member
Posts: 2103
From: Pretoria, SA
Joined: 06-18-2010


Message 52 of 55 (691162)
02-20-2013 11:08 PM
Reply to: Message 46 by xongsmith
02-20-2013 12:21 PM


Re: Evolution of multicellular organisms
xongsmith writes:
funny note: when i type "multicellular" it gets flagged as spelled wrong and suggests "unicellular". LOL
The word "multicellularity" too. I wasn't even sure whether it was a word or not.
To me all those critters seem weird and wonderful; maybe it's because I'm not a biologist and also because we evolved to try and understand things on middle-earth.
Edited by Pressie, : Edited first sentence

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Pressie
Member
Posts: 2103
From: Pretoria, SA
Joined: 06-18-2010


Message 53 of 55 (691163)
02-20-2013 11:10 PM
Reply to: Message 48 by Taq
02-20-2013 3:16 PM


Re: Evolution of multicellular organisms
Taq, well, I never....It's a strange, strange world we live in.
Thanks.

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Pressie
Member
Posts: 2103
From: Pretoria, SA
Joined: 06-18-2010


(2)
Message 54 of 55 (691164)
02-20-2013 11:16 PM
Reply to: Message 49 by Dr Adequate
02-20-2013 4:33 PM


Re: Evolution of multicellular organisms
Yes, Dr A.
The more I think about it, the more it seems as if this debate between RAZD and mindspawn is and was just meaningless in a broader context.
It was very, very informative to me, though.
Creos must hate all that knowledge. Those pesky biologists know way too much about biology. All that knowledge can't be good for them or for anyone else!
It seems as if the whole debate is just a result of a creationist using sciencey-sounding words to provide the impression that he knows something; while the sciencey-sounding words are irrelevant to reality. The conditions mindspawn placed for evolution to happen are not necessary at all.
Edited by Pressie, : Changed last sentence
Edited by Pressie, : No reason given.
Edited by Pressie, : No reason given.

This message is a reply to:
 Message 49 by Dr Adequate, posted 02-20-2013 4:33 PM Dr Adequate has not replied

  
Taq
Member
Posts: 10073
Joined: 03-06-2009
Member Rating: 5.2


(2)
Message 55 of 55 (691267)
02-21-2013 3:49 PM


Back to the Beginning
So let's go back to the very beginning of the debate. RAZD quoted two statements by mindspawn as the topic of the debate:
quote:
"... recent DNA sequencing is not providing enough support for the hypothesis of evolution. (ie increased DNA complexity of new and uniquely functional active coding genes within an organism is not observed to add fitness)."
and
"I have been looking ... for some evidence that a gene can duplicate, and then produce a novel function in the duplicated coding gene that adds fitness. Haven't seen it yet, this basic process of evolution remains unproven. Without it we would just have bacteria on earth, mutating and evolving into alternative forms but never gaining in complexity."
So does the cit+ duplication fit these criteria? Let's take a look.
First, is the cit gene duplication unique? Yes. The ancestral bacteria did not have two cit genes with different promoters. Not only that, but it produced a novel phenotype which is citrate utilization in aerobic conditions which was beneficial in the given environment. So we have a novel and beneficial phenotype produced by a gene duplication.
Second, does this qualify as an increase in DNA complexity as it relates to the evolution of morphological complexity such as the transition from unicellular to multicellular? Again, the answer is yes. The basic advancement needed for bridging the gap between unicellular and multicellular life is the ability to control gene regulation. Increasing the number of genes under different promoters is essential for increasing the types of tissues and functions that a multicellular organism can have. That is the entire basis for homeobox genes and their importance in metazoan evolution through duplication and divergence of function. Hox genes are transcription factors that bind to gene promoters, and increasing the genes under the influence of different promoters is an increase in genome complexity.
So I would say that the cit+ example fits all of the mindspawn's criteria.

  
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