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Author | Topic: Does Darwinism Equal "No God"? | |||||||||||||||||||||||||||
MangyTiger Member (Idle past 6382 days) Posts: 989 From: Leicester, UK Joined: |
Didn't you go to school? I do remember ******* being briefly mentioned in my biology lessons at school in the mid-1970s (in England rather than the US of course). We were taught his claims had pretty much turned out to be wrong. By the way, when I say 'briefly' I really mean briefly. I don't think ******* and his drawings got more than a passing mention in one - yes one single - lesson. Edit: Ok, very clever - who set the board up to convert Heackel to be converted to asterisks when spelled correctly? This message has been edited by MangyTiger, 12-23-2005 08:45 PM I wish I didn't know now what I didn't know then
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MangyTiger Member (Idle past 6382 days) Posts: 989 From: Leicester, UK Joined: |
and evos in the field relied on these claims as factual as well. Could you please provide specific support for this claim? Something in a published paper which directly relies on H's work would be good. I wish I didn't know now what I didn't know then
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randman  Suspended Member (Idle past 4927 days) Posts: 6367 Joined: |
Nwr, yep, it was discredited very early on, but evos kept using it well until at least 1997, and I suspect some still do. That's the whole point. They refused to accept the facts and kept inisting the law of recapitulation was true, first the Biogenetic law which was standard fare in textbooks well into the 50s. My Dad was taught it in college in the late 50s.
Then, the law of recapitulation was taught, but a watered down form consisting of claims of a highly conserved embryonic stage called the phylotypic stage. I think some evos still advance that concept, but Richardson claims in 19997 that it was widely accepted among evos and that Hae ckel's data was accepted as evidence. So we have 125 years of evos insisting something was true despite it being debunked early on. The truth is the myth is far from dead. Evos relied so heavily on this claim that they are already backtracking and insisting there is some merit to the claims. Heck, Richardson has been so widely quoted as referring to this as one of "the biggest hoaxes in biology" that it looks like he has buckled some, and now has written Hae ckel's drawings can be "good teaching aides." History may well repeat itself with evos back in business asserting the law of recapitulation in all it's glory. This message has been edited by randman, 12-23-2005 09:06 PM
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ReverendDG Member (Idle past 4139 days) Posts: 1119 From: Topeka,kansas Joined: |
What does this have to do with the topic?, can you post anything outside of a teaching textbook, that shows evos use this from day to day?
if you can't, give it up fine a new horse to beat *******, is old news This message has been edited by ReverendDG, 12-23-2005 09:17 PM
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randman  Suspended Member (Idle past 4927 days) Posts: 6367 Joined: |
I already have ad nauseum, but just for you.
Some authors have suggested that members of most or all vertebrate clades pass through a virtually identical, conserved stage. This idea was promoted by *******, and has recently been revived in the context of claims regarding the universality of developmental mechanisms. Thus embryonic resemblance at the tailbud stage has been linked with a conserved pattern of developmental gene expression - the zootype. *******’s drawings of the external morphology of various vertebrates remain the most comprehensive comparative data purporting to show a conserved stage. A prevalent idea in developmental evolution is that intermediate embryonic stages are resistant to evolutionary change, and that differences among species arise through divergence at later stages of development. As a consequence, all vertebrates are often said to pass through a common stage when they look virtually identical (******* 1874; Butler and Juurlink 1987; Wolpert 1991; Alberts et al. 1994; Collins 1995). The conserved stage is called the phylotypic stage because it is thought to be the point in development when there is maximum resemblance among members of a phylum or comparable higher taxon (Slack et al. 1993). Conservation of embryonic form is thought to be associated with the conservation of patterns of developmental gene expression across a wide range of animal clades (Slack et al. 1993). One puzzling feature of the debate in this field is that while many authors have written of a conserved embryonic stage, no one has cited any comparative data in support of the idea. It is almost as though the phylotypic stage is regarded as a biological concept for which no proof is needed. It has been claimed that all vertebrate embryos pass through a conserved stage when they are the same size (Collins 1995). Our aim in this paper is to examine the idea that embryos from all or most vertebrate clades pass through a highly conserved stage; and that at this stage their external form is virtually identical. *******’s drawings of embryos at tailbud stages are widely used in support of this hypothesis. Another point to emerge from this study is the considerable inaccuracy of *******’s famous figures. These drawings are still widely reproduced in textbooks and review articles, and continue to exert a significant influence on the development of ideas in this field (Wolpert 1991; Alberts et al. 1994; Duboule 1994). These modifications of embryonic development are difficult to reconcile with the idea that most or all vertebrate clades pass through an embryonic stage that is highly resistant to evolutionary change. This idea is implicit in *******’s drawings, MK Rich Ardson - MK Blog Rich
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nwr Member Posts: 6412 From: Geneva, Illinois Joined: Member Rating: 4.5 |
Nwr, yep, it was discredited very early on, but evos kept using it well until at least 1997, and I suspect some still do.
It was used until at least 1997 in embryology. I haven't seen the evidence of it being recently used in evolution. I think part of your confusion, is that you are unable to clearly distinguish between evolution and embryology. Aren't we way off topic here? Impeach Bush.
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randman  Suspended Member (Idle past 4927 days) Posts: 6367 Joined: |
It is used in embryology as an example of evolution. It's directly related to evolutionary claims.
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nwr Member Posts: 6412 From: Geneva, Illinois Joined: Member Rating: 4.5 |
It is used in embryology as an example of evolution. It's directly related to evolutionary claims.
Embryology is a separate subfield of biology. Sure, embryology depends on evolution. Just about everything in biology is connected to evolution. But evolution does not depend on embryology. This is still off-topic. I won't respond to further on this diversion. Impeach Bush.
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Faith  Suspended Member (Idle past 1473 days) Posts: 35298 From: Nevada, USA Joined: |
It is used in embryology as an example of evolution. It's directly related to evolutionary claims. Yes, it is treated as proof of evolution or simply taken for granted as an expression of evolution. But they are just going to continue to insist you are wrong. That's our job here, RM, to be wrong, never get anything right, always be accused of all kinds of violations of some rules known only to them. It's a high calling really.
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robinrohan Inactive Member |
If you are talking about *******, my book shows some drawings by him.
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robinrohan Inactive Member |
If you are talking about *******, my book shows some drawings by him.
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edge Member (Idle past 1734 days) Posts: 4696 From: Colorado, USA Joined: |
Actually, ******* made two mistakes. One was to equate embryological stages with adult phylogenetic history, when even today, embryologists accept similarities of embryological stages. THe other mistake ******* made was to fake his drawings to support his contention. This was a contentious issue at the time of ******* and he was under pressure to support his idea.
Now, we have photographs to show the sequence of development including pharyngeal pouches, webbed digits, the juxtaposition of jaw and auditory bones, the reduction of the tail to vestigial remnants and separate bones becoming fused, among others. These are stages of early development and NOT related to adult forms, which was *******'s hypothesis. While YECs ridicule the idea of development through stages, embryologists deal with it every day.
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randman  Suspended Member (Idle past 4927 days) Posts: 6367 Joined: |
Good point, Faith. There rarely appears to be a genuine effort on the evo side to engage the topics honestly.
This message has been edited by randman, 12-23-2005 09:55 PM
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robinrohan Inactive Member |
There rarely appears to be a genuine effort on the evo side to engage the topics honestly. I'm sorry you feel that way.
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randman  Suspended Member (Idle past 4927 days) Posts: 6367 Joined: |
I am too, but just being honest about most exchanges I see here, though not all.
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