Possible Pathways for the Evolution of Irreducible Complexity?

Here, I analyze two evolutionary pathways which have been suggested as Darwinian explanations for the origin of irreducibly complex systems, focusing specifically on a subset of irreducibly complex molecular machines. I explore scaffolding and Elimination of Functional Redundancy, and conclude that neither of these two pathways are general solutions to the origin of irreducibly complex molecular machines.

For more info on biological origins, check out my website:
thegenomestale.wordpress.com

This video is also a bit of a response to QualiaSoup's video, "Irreducible Complexity Cut Down to Size," which can be found here:
http://www.youtube.com/watch?v=W96AJ0ChboU

Note that there may be a few typos in this video. Typos do not reflect my education, but rather my video making skills.

Category:

Education

Tags:

• irreducible complexity
• evolution
• intelligent design
• the genome's tale
• genomiques
• biology
• science
• molecular machine
• darwinian evolution
• bacterial flagellum
• evolution of flagellum

[jessydaytime]

False. Evidence of precursors that had completely different functions exist. In contrast, there is zero evidence of Behe's theory supports it. Behe also makes assumptions that structures must work well or efficiently in order to be of value to the organism. False, because nature is full of examples of clumsy and imperfect structures that merely get by. Oversimplified with a false premise. This is an unoriginal creationist vlog.

[Genomiques]

@jessydaytime

"Evidence of precursors that had completely different functions exist."

But that's not the point of my video (I take it that you DID watch it?). I'm not even saying that IC systems cannot evolve. All I am saying is that scaffolding and Elimination of Functional Redundancy do not offer general solutions to the origin of IC molecular machines. BTW, I'm not a creationist.

[TheEaglestar1]

Excellent video,well presented and directed,explained thoroughly and scientifically objective.

[Genomiques]

@TheEaglestar1

Thanks Eagle!

[Genomiques]

@davidmcaba

Finally, I have already said many times that I am ONLY using the bridge example as an example of how scaffolding works. There are many biological functions which can only function through the interaction of multiple components. Such systems cannot arise through pure scaffolding because you'd have to start with one component, but one component cannot carry out the function. If you invoke changes of function, then you're using cooption as your explanation, not scaffolding.

[Genomiques]

@davidmcaba

As you can see from the quoted article (written by Dr. Douglas Theobald), I do not misrepresent bridge scaffolding.

[Genomiques]

@davidmcaba

Yea but:

"A clear example of the Mullerian two-step [which is essentially scaffolding] is given by a stone bridge. Consider a crude 'precursor bridge' made of three stones. This bridge spans the area needed to be crossed and is thus functional. For step one of the Mullerian two-step, a part is added: a flat stone on top, covering all precursor stones. Whether this improves the functionality of the bridge is irrelevant..."

"Why Behe's 'Irreducible Complexity' is Silly," TalkOrigins

[davidmcaba]

@Genomiques You are simply stating your thesis. I have already shown two errors in your presentation. 1) You incorrectly present bridge scaffolding by giving the bridge function to the initial ABC system, when it is supposed to arise from the ADC system that arises from the ABC system through scaffolding. 2) You continue this error by false attributing the full function to a single component, which is the cornerstone of your argument.

[Genomiques]

@davidmcaba

"Also, please note..."

Yea but with the bridge example we're already starting with three components. 

[Genomiques]

@davidmcaba

It depends on the components, and where the original components are localized in the cell. If the components are localized in different sublocations in the cell, then almost certainly more than one mutation will have to occur to each component to bring them to a new cellular location.