Question About Evolution
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20-01-2011, 04:09 PM
 
Question About Evolution
Hola, I just have a couple questions about evolution.

Why are there still cells and stuff like that? I've seen the video with the colonization video, but that didn't really explain it to me. Why isn't everything evolving to have brains and eyes and things like that? Even when speciation occurs and one path continues on to more complex life, why does the other path not evolve in a similar way?

I do accept evolution, that has always just been my one question.
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20-01-2011, 04:15 PM
RE: Question About Evolution
Cells are still needed to be the basic building blocks for developing multicellular creatures.

http://www.youtube.com/watch?v=VLr-_L5HuhU

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20-01-2011, 04:24 PM
RE: Question About Evolution
(20-01-2011 04:09 PM)Zallomallo Wrote:  Even when speciation occurs and one path continues on to more complex life, why does the other path not evolve in a similar way?

It does evolve in a similar way. Or rather a slightly less than similar way. And then so on and so on until the once similar species has evolved hundreds of times over millions of years in slightly less similar ways until they aren't similar at all.

Darwin's Tree of Life

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20-01-2011, 05:11 PM
 
RE: Question About Evolution
Well what I mean is, why do we have single celled organisms, shouldn't they have evolved into multicelled?
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20-01-2011, 07:47 PM
RE: Question About Evolution
(20-01-2011 05:11 PM)Zallomallo Wrote:  Well what I mean is, why do we have single celled organisms, shouldn't they have evolved into multicelled?

Some single cells didn't have to become multi-celled because the environment where they belonged too didn't required them to evolved. Your statement is like how some creationists debate to us why evolution is wrong.

"Well if we evolved from apes. Why hasn't the chimp evolved more into a human."

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20-01-2011, 09:09 PM
RE: Question About Evolution
(20-01-2011 05:11 PM)Zallomallo Wrote:  Well what I mean is, why do we have single celled organisms, shouldn't they have evolved into multicelled?

No. Evolution doesn't have any "should"s. If an organism has no need to evolve, it probably won't ("probably" because it still might, despite the fact that there's no pressure on it to). Single-celled organisms fit their ecological niches quite nicely. They don't have any evolutionary pressure to change.

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20-01-2011, 09:28 PM
 
RE: Question About Evolution
Okay, I finally get it with the niches/evolutionary stability thing.

Thank you for your help.
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20-01-2011, 11:32 PM
RE: Question About Evolution
Quote:Why isn't everything evolving to have brains and eyes and things like that?
There's no pressure. Those things are not relevant to the survival and reproduction of a species that doesn't already have those things.
There are costs and benefits. A bird with a big big brain would need alot more energy to live than its rivals, so it would have to find alot more food than the others. The normal birds only have the instincts for survival and reproduction, so a big brain might not have very much benefit.

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21-01-2011, 01:26 PM
RE: Question About Evolution
(20-01-2011 09:28 PM)Zallomallo Wrote:  Okay, I finally get it with the niches/evolutionary stability thing.

Thank you for your help.

No problem. Feel free to stick around if you have any more questions. Or if you don't. Tongue

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21-01-2011, 11:58 PM
RE: Question About Evolution
(20-01-2011 04:09 PM)Zallomallo Wrote:  Why isn't everything evolving to have brains and eyes and things like that? Even when speciation occurs and one path continues on to more complex life, why does the other path not evolve in a similar way?

Evolution is NOT a driving force. Evolution is the result of the processes of "natural selection" and the "competition to survive."

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