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Author Topic:   What i can't understand about evolution....
Deftil
Member (Idle past 4455 days)
Posts: 128
From: Virginia, USA
Joined: 04-19-2008


Message 6 of 493 (489739)
11-29-2008 4:28 PM
Reply to: Message 1 by Integral
11-29-2008 6:36 AM


Hello Integral.
Your question is a fairly common one about evolution.
The idea is definitely that evolution has taken a very long time and that structures usually appear gradually. Also, partial versions of structures CAN often be useful. A creature with a "partial wing" for example, may not be able to fly but will likely be able to glide which will give him an advantage over other individuals that can not glide. It also seems true that structures can sometimes change function over time. Fins that were once good for swimming in water can evolve into legs that are good for walking on land.
I'll provide you with some links that I believe address your point.
Response regarding irreducible complexity, the idea that the removal of any part of some systems will cause them to be useless - CB200: Irreducible complexity
Response to the claim that "Complex organs and biological functions could not have evolved." - CB300: Evolution of complex organs
Response to the specific claim that some organs and structures would be useless, and a hinderance until all parts of it were in place - CB340: Evolution of complex organs and also EvoWiki on "Organs and organ systems would be useless until all parts are in place" and also EvoWiki on "New structures would be useless until fully developed"
I hope this helps shed some light on the explanations for your question.

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 Message 1 by Integral, posted 11-29-2008 6:36 AM Integral has not replied

Deftil
Member (Idle past 4455 days)
Posts: 128
From: Virginia, USA
Joined: 04-19-2008


Message 53 of 493 (490309)
12-03-2008 5:04 PM


I thought there was actually a thread dedicated to speciation events, but I searched and didn't find one. I did come across a thread relevant to what's being discussed here though - MACROevolution vs MICROevolution - what is it?
I know in one thread or another I've provided some examples of speciation events before, and now I'll just provide some links that list some speciation events.
Observed Instances of Speciation
The above link discusses relevant issues to the discussion including species definitions, and starts listing events at section 5.0 Observed Instances of Speciation. Whether or not they all, if any, are deemed acceptable to all I cannot say.
Some More Observed Speciation Events
This is a different page from the same website as the previous link listing more speciation events.
Oh, hey... I just found a thread on EvC about speciation events... through Google - Speciation events
I'd swear that one didn't come up for some reason when I did a search on here.

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