|
Register | Sign In |
|
QuickSearch
Thread ▼ Details |
|
|
Author | Topic: How can evolution explain body symmetry? | |||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
Interesting would be to investigate if blind animals, like moles, show less symmetry, then other animals. Sexual selection on symmetry, for a blind animal, must be a difficult task.
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
There are more ways to find out if a potential mate is symmetrical than just by sight Please tell me, I am really curious.
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
Well, when a man and a woman love each other very much...
You mean by feeling eachother? How disgusting and how inaccurate.
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
Did it occur to you that I was making a joke?
Yes, sure. But did it occur to you that I was making a joke? Anyway, a serious reply I don't have to expect here. Smelling or feeling symmetry is out of the question. Moles are as symmetrical as other vertebrates, so sexual selection is not the main selection force for symmetry.
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
nice idea for a research project though, peter.
Thanks, Mick.
publish if you get a phylogenetic correlation, add to the filing cabinet if you don't.
As soon as I get the time for it.--------------------------------- Here is a very nice a-symmetric animal: This message has been edited by Peter van der Hoog, 05-07-2005 01:32 PM
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
can I ask what it is? I appriciate your question, Mick. As a junior, it is nice to get some attention. It is a sea squirts or ascidean. All sea squirts have two 'holes' or siphons, one in which water is drawn into the body (inhalent siphon), the other through which water is expelled from the body (exhalent siphon). With the water comes plankton, which is extracted in the net-like stomach before the water is expelled. These animals are therefore filter feeders. Sea squirts are an excellent proof evolution does not care about symmetry. The only thing that matters is: Does It Work.
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
Is that its real colour, or is it under UV light?
No idea, I did not take the picture myself. What do you think? ----------------Something else, I liked this article from the New Yorker: Why intelligent design is bad science
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
Feeling symmetry is not impossible but a visual check is more accurate. This mole found a solution for bad eyesight:
Do you know how these moles flirt? They put their heads very near to eachother and then feel the symmetry of the tentacles. Isn't nature beautiful?
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
"amorphic"? No idea what you are talking about, Brad McFall.
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
quote:This is a complete misunderstanding of how design really works in human culture. Human design is a process of trial and error, and passing on successful approaches to students. In this respect it is exactly analogous not to divine creation, but to natural selection. Each time something is thought that might work, it relies either on past experience, that is, trial and error, or some leap, large or small, that is not guaranteed to be successful until it is tried out. Individually we learn by personal experience; corporately we learn by the experience of many.
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
A Lamarckian? Please, I am not even a Memetist!
Your "loosely analogous" I find much too strong. Would you agree with "pretty analogous"?
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
Suppose you suddenly heard a voice saying: "Hello PurpleYouko, here is God, the creator of the universe, your mother was right, the world was created only 5000 years ago." How to deal with such a voice and in addition: don't you agree with me that Iano is a true scientist, because:
1) Iano observes that God behaves regularly and he observes a pattern to this phenomenon. 2) Iano studies God and tries to figure out how God works 3) Iano tries to figure out how God works by coming up with ideas that explain what we see. 4) Iano is testing his ideas about God by noting what else we should see if his ideas are correct and then checking if we see those ideas. What I want to say: How to deal with people who feel the existince of a God?
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
So, Peter, how do you think Evolution can or cannot explain body symmetry?
Evolution explains body symmetry, as gravity explains how a stone rolls of a mountain. This message has been edited by Peter van der Hoog, 08-14-2005 07:16 PM
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
HUUHH?
You never feared God’s voice?
I don't recall him mentioning God at all.
Iano is a Christian. The existince of God is a reality for him.
What? Are you reading the same thread as me? Yes, 200% sure.
No he isn't Yes, he is. Iano is testing his ideas about God by noting what else we should see if his ideas are correct and then checking if we see those ideas. Read all his messages and you will agree with me.
and what does any of this have to do with the thread anyway? Your reactions have no relation with symmetry, so who is blaming who? At least I am thinking of symmetry, while typing these sentences.
I don't have the faintest idea seeing as how feelings of any kind are not scientifically defensible. Sorry? Anyway, all I said was: How to deal with a person like Iano, who thinks God is a reality. Is that such a difficult remark/question?
Besides which this is even way off topic for the OT part of the thread and it has absolutely zip to do with body symmetry. At least I am thinking of symmetry, while writing this and I did make some relevant remarks, regarding body symmetry. You haven't.
|
|||||||||||||||||||||||||||
Peter van der Hoog Inactive Member |
For sure, it would make a wonderful topic but with only you and me, it will be like mum and dad discussing Santa Claus.
What we need is: - An atheist, with a scientific approach and no resentment versus religion- A religious person, with a scientific approach, and no resentment versus atheism. Neither Iano nor PurpleYouko fall within those categories and God knows about you but I still resent the people who tried to force these horrible religious believes onto me. What do you think comes more natural, to be an atheist or to believe in God? Somebody once told me that to believe in God requires a lot of energy. In addition, who do you think lives longer, an atheist or a believer in an afterlife? When a believer suffers tremendous pain but he knows paradise is waiting for him, he would give in, don’t you agree?
|
|
|
Do Nothing Button
Copyright 2001-2023 by EvC Forum, All Rights Reserved
Version 4.2
Innovative software from Qwixotic © 2024