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Understanding of Evolution Thread

PsychoSarah

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Mark yourself as a creationist or evolution supporter, then attempt to describe as much as you can about evolution and how it works, as the theory itself states. The rules:

No responding to anyone; this is a bit of an experiment, just to see what people honestly think independently. Do not attempt to correct people, or encourage them to say more.

Try to be serious, no snarky answers.

Answer independently of the fact that you support or deny evolution. Your response should be as neutral as possible, with no criticizing or promotional language.
 

SkyWriting

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Answer independently of the fact that you support or deny evolution. Your response should be as neutral as possible, with no criticizing or promotional language.

Evolution theory is an explanation of the workings of natural variation found is any working system.
Tires on a car will work within a certain range, the engine a certain range of rpm, pressure, temperature, etc.

All systems have a range of variance and a biological system is no different. Evolution attempts to describe
how this system works as it copes with changing environmental conditions.
 
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whois

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Mark yourself as a creationist or evolution supporter, then attempt to describe as much as you can about evolution and how it works, as the theory itself states. The rules:

No responding to anyone; this is a bit of an experiment, just to see what people honestly think independently. Do not attempt to correct people, or encourage them to say more.

Try to be serious, no snarky answers.

Answer independently of the fact that you support or deny evolution. Your response should be as neutral as possible, with no criticizing or promotional language.
my honest answer is, i don't know what to think about evolution.
i can say it makes sense.
but when you start diving into it, you find all kinds of shadiness associated with it.
judging from my experience debating this topic, and from what i know to be the facts, i question the validity of almost everything about evolution.

i once thought that the increasing complexity of the fossil record was evidence for evolution.
then john maynard smith comes along and states there is no empirical evidence for increasing complexity.
and that's the very tip of the iceberg.

i think it's safe to say, evolution as you know it is nothing more than dogma.

BTW, this post was made before reading any of the others except the OP.

edit:
sarah said:
Now, will people please edit their posts accordingly?
i'm editing.
Whois didn't follow the rules though; he used language that implied evolution was invalid.
okay, questioning the validity of what is written about it is not questioning evolution.
evolution is not the gradualistic, adaptive paradigm you are led to believe it is.
the notion of progress in regards to evolution is not correct.
You're just supposed to say all that you understand about it, . . .
i know that the 2 basic tenets of evolution, abiogenesis, and common descent, have no empirical evidence to support it.
the ability to trace gene history through deep time flies in the face of gene acquisition by mutation.
. . . not what you feel about it.
how i feel about evolution is a direct consequence of what i know about it.

i guess i can leave this here:
Some of us first met to discuss these advances six years ago. In the time since, as members of an interdisciplinary team, we have worked intensively to develop a broader framework, termed the extended evolutionary synthesis1 (EES), and to flesh out its structure, assumptions and predictions.
. . .
The number of biologists calling for change in how evolution is conceptualized is growing rapidly. Strong support comes from allied disciplines, particularly developmental biology, but also genomics, epigenetics, ecology and social science.
. . .
Yet the mere mention of the EES often evokes an emotional, even hostile, reaction among evolutionary biologists. Too often, vital discussions descend into acrimony, with accusations of muddle or misrepresentation.
www.nature.com/news/does-evolutionary-theory-need-a-rethink-1.16080

i certainly know what it's like to be accused of misrepresentation.

edit 2:
on natural selection:
The concept of natural selection as the foundation of evolutionary change has been largely superseded, mostly through the work of Motoo Kimura, Tomoko Ohta, and others, who have shown both theoretically and empirically that natural selection has little or no effect on the vast majority of the genomes of most living organisms.
. . .
Kimura, Ohta, Jukes, and Crow dropped a monkey wrench into the "engine" at the heart of the modern synthesis — natural selection — and then Gould and Lewontin finished the job with their famous paper on “the spandrels of San Marco and the Panglossian paradigm”. The rise of evo-devo over the past two decades has laid the groundwork for a completely new and empirically testable theory of macroevolution, a theory that is currently facilitating exponential progress in our understanding of how major evolutionary transitions happen. And iconoclasts like Lynn Margulis, Eva Jablonka, Marian Lamb, Mary Jane West-Eberhard, and David Sloan Wilson are rapidly overturning our understanding of how evolutionary change happens at all levels, and how it is inherited.
evolutionlist.blogspot.com/2009/11/modern-synthesis-is-dead-long-live.html

However, some of the assumptions at the foundation of The Modern Synthesis started to crumble in the 1970s with the discovery of super-abundant genetic variation that arguably often didn't evolve under the strict aegis of natural selection. Then cells were found to incorporate genes, mobile genetic elements, and organelles of diverse historical origins. Furthermore, it became apparent in the last decades of the 20th Century that DNA sequences often evolved in ways that reduced the fitness of the organisms that bore them. It is now abundantly clear that living things often attain a degree of genomic complexity far beyond simple models like the "gene library" genome of the Modern Synthesis.
. . .
Furthermore, we do not suppose that a single review article could conceivably do justice to all the relevant complexities of research on these topics. Instead, we discuss aspects of research on these questions that serve to illustrate our general view that a new biology has developed and, in conjunction, many important assumptions of 20th Century biology have been abandoned.
. . .
We should be equally clear that, in arguing for the necessity of this intellectual transformation, we do not think that those who based their research on the Modern Synthesis were "bad scientists" and those who now abandon it are "good scientists." We are simply offering an overview of how a large number of us have changed our thinking, our biological Weltanschauung.
www.ncbi.nlm.nih.gov/pmc/articles/PMC2222615/
 
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SkyWriting

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I will translate that so it is easier to read, for those that don't know what the delta represents:
evolution equals change in alleles over time.
Hey...."No responding to anyone"

Opps....sorry! My bad.
 
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Loudmouth

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Mark yourself as a creationist or evolution supporter, then attempt to describe as much as you can about evolution and how it works, as the theory itself states.

Evolution acceptor. Supporter of science education.

If I tried to explain as much as I could it would take up pages and pages, which doesn't seem very helpful. There are already books out there that do the same thing, but with more talented authors.

What the theory states is that evolution is a two step process. The first step is the production of variation which we call DNA mutation. This can include anything from a change in a single base to the incorporation of a large chunk of exogenous DNA. This step is blind to the needs of the organism, which scientists also describe as being random with respect to fitness. The second step is selection. In this step, environmental pressures cause certain mutations to either become more common or less common. Other mutations may increase or decrease in number by pure chance if they don't affect fitness one way or another.

That's evolution in a nutshell.
 
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I accept the theory of evolution as our best explanation of reality.

Evolution is a change in the frequency of alleles, within a population, over time. There are two principle driving forces: natural selection and genetic drift.

Genetic drift is when allele frequencies change at random, and is more pronounced the smaller the population is. It generally reduces the amount of genetic diversity within a population, as the random nature of the changes tend to cause one allele to become more prevelent, driving it towards becoming 'fixed' (i.e. the only one left in the population), regardless of its 'fitness'. In extreme cases it can lead to inbreeding depression, where many genes become fixed, for example, in Cheetahs, that experienced a severe population bottleneck about 10,000 years ago, I think (I'm doing this from memory, so I can't quite remember).

Natural selection is when the allele frequencies change due to the preferential survival of certain individuals over others, within the population, mainly due to environmental conditions, sexual preferences or barriers forming between different populations of the same species (i.e. ocean formation, desertification, or even just different individuals having different mating behaviours, leading to them mating at different times or in different areas, etc. Or anything that reduces the mixing of individuals across the entire population, such as great distance from one end of the population range to the other. A special example would be ring-species.)

Interestingly, much speciation seems to occur when the climate is relatively stable, rather than changing a lot. That's because when the climate is changing rapidly, the survivers tend to be the ones that can survive in a range of different environments, so there is less selection pressure to adapt to any one environment. When the climate is stable, they start adapting to more specific aspects of the environment that they find themselves in.

There's probably more I could say, but it's late and I can't be bothered :)
 
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Dr GS Hurd

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pat34lee

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What is evolution according to the theory?

Skipping origins, since most people agree they are outside the realm of science.

Evolution is actually two theories in one. Perhaps three, if you include adaptation.

Survival of the fittest (luckiest in many cases). Those with the best genes survive
long enough to pass the genes on to future generations. Doesn't really hold water
for most species of animals, though.

Changes and additions to the genes result in new forms of animals and plants, and
new features in existing ones. Disproven by observation in nature.

Adaptation is change within genetic limits for a species to aid survival. This can make
the animals shorter, taller, fatter, faster, etc., but it has limits and cannot create anything
new. This is science, and the only factual part of the evolution theory.
 
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Subduction Zone

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Oops, did not read the OP. But here we go. The theory of evolution explains how life got to its present observed diversity through a process of small changes over time. Sometimes those changes were rapid (in a geologic time scale) due to sudden changes in environment. This is supported by many different sources of scientific evidence. It is supported by phylogeny, the fossil record, the observed nested hierarchies of DNA, ERV's, biochemistry and others.
 
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Hoghead1

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I believe that God, evolution, and the Bible are all reconcilable. My biggest concern on this site is that I find many of the attacks on science show a complete and totally lack of education on the part of the critic. I feel I can speak with authority. I have a master's degree in a major scientific field, from a Big 10 U. No naming names here, to protect my identify. I has consdie4rabgle exposure to scientists profession evolution, their methods, there findings, even their spirituality. Based on my first-hand experience, I would say that creation science is an absolute fraud and that many of the critics of evolution here should go get an education before they come here to shoot their mouths off about science. It would also be helpful for those guys to consider getting an education in Christianity and the Bible. There is a certain w element here that, without benefit of any real education, assume that anyone who dares disagree in the least with their dogmas is a horrible person bound for hell. This includes fellow Christians who do not share their views. Hence, this site abounds with hate mail intended to slap down the character of the recipient. I refuse to respond to such emails. This is a rational discussion group and attacking your opponent is strictly off limits. It needs to be stressed that not all Christians are, can, or should be on the right. Consequently, there is a strong liberal tradition in Christianity. Those of us working from that perspective do not have a problem reconciling God, evolution, and the Bible.
 
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Willtor

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Evolutionist.

Evolution is the process by which species adapt to their environments. Organisms that are better suited to their environments have an increased chance of reproducing. For organisms that share genetic information within a population, when a beneficial allele appears or an existing allele begins to confer a benefit (due to environmental changes), the chances are good that its frequency will increase within that population, generation-by-generation.
 
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Lulav

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Interrupt mod hat.jpg

Closing for Review
 
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Hammster

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MOD HAT ON

Reopening.

This thread has gone through a big clean up. The OP had a very specific requirement...no replying to other posts. Some of you had trouble following this. This made your posts off topic, which is a violation.

All reports from this thread will go away. If, after reading this and the OP, you still cannot comply, you will be actioned accordingly.


MOD HAT OFF
 
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freezerman2000

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Theistic Evolutionist
The Bible and Evolution are compatible..The Bible states that God created everything including us..it just doesn't go into the processes involved.
Science is learning more and more about those processes and my faith gets strengthened for it.
 
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