Full Version : Evolution, Biology, and Genetics
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admin- 09-09-2006
| QUOTE (captain 67™ @ September 09, 2006 09:34 am) |
| going by darwin's natural selection theories wouldn't that mean that all people that had an "advantage" over others would reproduce and the others wouldn't yes? if natural selection was more evident now in the human race wouldnt that mean that ugly people wouldn't reproduce...? |
No. We can have genetic drift but natural selection works on poplulations under stress. In the U.S. and other developed countries we are not under environmental stress. But if you go to Africa or extremely underdeveloped portions of the world. People that are more resistant to disease and are able to hunt food much better are the ones that will reproduce much more.
DeathsMother- 09-09-2006
where are the transitional forms?
admin- 09-09-2006
| QUOTE (DeathsMother @ September 09, 2006 09:38 am) |
| where are the transitional forms? |
An individual that shows characterisitcs unique to two other species.
captain 67™- 09-09-2006
Dont act like you know what you are talking about So SicK.
admin- 09-09-2006
| QUOTE (captain 67™ @ September 09, 2006 09:40 am) |
| Dont act like you know what you are talking about So SicK. |
Don't make me kick you in the nuts.
DeathsMother- 09-09-2006
Pwned... I mean, seriously, saying something like that? Could you please, using your obviously superior intellect, explain exactly why evolution doesn't occur?
Now, as for the where the single celled organsim originally came from, I have read about experiments done in an attempt to recreate early Earth environments. Some of them ended up producing organic compounds (not living things, but things common in life). Some of the naturally occuring molecules, with hydorphilic and hydrophobic ends, form bubbles, similar to a cell membrane. Of course, there is no life present there, but a basic skeleton is set up. Here's Wikipedia's article on it. There are several places where errors may've been made, but it's always good to remain open to an idea.
I also recommend Wikipedia's page on evolution. It tells several common misconceptions, like that of differences between "macro-evolution" and "micro-evolution"
ekattan- 09-09-2006
If I cut a lizards tail off it will grow back, is that evolution? So a bees wing gew larger, wow! That does it for me.
Listen people are not bess or catfish for that matter and we did not just grow taller. Darwing clearly stated that we derived from apes, now thats a huge F**King leap, and his only explanation is time.
Scientists try to prove this with discovered homind bones which are not complere or don't even prove anything. There is no way of linking us to them.
Evolution is just a theory but it is accepted as a fact
Just like religion! All taken on faith. "We have to believe them because it's the scientists who say that and it's in our science books."
There is no conclusive evidence Just comparisons we have observed on species that don't even resemble us.
Do you actually think it's possible man's so complex genetic material actually derived from a singled celled organism? How? You can't prove it, only through experimental comparisons on fruit flies?
BinoChrist™- 09-09-2006
Evolution has been proven true on many accounts.
Evolution...ESPECIALLY ADAPTATION is a proven fact. That's how you get so many different kinds of humans, birds, dogs.......it's based on their environment.
While you can not deny all of evolution...and all of it's theories...you CAN deny the ones that link it to a "big bang theory" and such.
As he stated..."linear evolution" has been long proven wrong and is no longer accepted as part of the theory (although many christian fundamentalists still make evolutionists defend that argument...or at least say that it is still part of the doctrine.)
The point is...evolution is entirely possible. In fact...why not? Let's throw God in the mix...just to stir some trouble.
If God is going to create the earth...and give it a date where he will destroy it all.........what's going to happen in the mean time? Is everything just going to be stagnant and remain the same from the day he created it to the day he ends it?
Not likely...especially with free thought.
The part that might confuse you guys is that humans are the only ones to violate evolution. The only ones to DIRECTLY conflict with it. You tell me another species who made their environment adapt to their living style rather than adapting to their environment.
Rambling shall come to a halt.
the chemical- 09-09-2006
To a person who has never really delved too deeply into the scientific world - i.e. me, Darwinism just seems to make sense.
As I see it, bacterial life sprouted from something or other (who really knows what) a few billion years ago and has slowly developed into the multitude of species that exist on our planet now.
Aren't chimpanzees DNA 98% identical to humans DNA. Thus, the supposed 'giant' evolutionary leap must be at least plausible under the theory of evolution. (even though evolution is not linear, as you've been saying Achilles).
Until another theory comes along with a vast amount of research and evidence backing it up, or a new piece of evidence comes about to blow darwinism out of the water, Darwin's theory of evolution seems to explain the topic best.
BinoChrist™- 09-09-2006
| QUOTE (the chemical @ September 09, 2006 02:44 pm) |
To a person who has never really delved too deeply into the scientific world - i.e. me, Darwinism just seems to make sense.
As I see it, bacterial life sprouted from something or other (who really knows what) a few billion years ago and has slowly developed into the multitude of species that exist on our planet now.
Aren't chimpanzees DNA 98% identical to humans DNA. Thus, the supposed 'giant' evolutionary leap must be at least plausible under the theory of evolution. (even though evolution is not linear, as you've been saying Achilles).
Until another theory comes along with a vast amount of research and evidence backing it up, or a new piece of evidence comes about to blow darwinism out of the water, Darwin's theory of evolution seems to explain the topic best. |
I'm pretty sure that Darwin denied a few of his own theories, and the evolutionary part you're talking about was one of them...I believe. I haven't seen that stuff in ages...considering I was like 14-15 when I saw it...but what you're talking about is considered linear evolution.
Crossing the line from one species to another.
I could be wrong...cause that information was from a WHILE ago...so don't hold me fully accountable. But don't come in here saying I'm full of crap unless you've got documented proof of what you're talking about...cause I've seen it before, just not in a while.
I know what I'm talking about...just not everything about it...lol.
I got nothin...
admin- 09-09-2006
Ok. E-dog. You are hung up on darwin. It is not just him. He was the first person to publish the theory. Every study since then in every form of biology puts more evidence towards that theory.
If you do not want to look at 100's of years of experiments and evidence and come to your own conclusions that is fine. But don't just let people tell you that it is wrong because of this and that. Look at the research yourself. Not webpages full of people trying to tear it apart because of religious zealots don't like what it says.
If you are uncomfortable with being 99% genetically identical to apes that is fine. You can be uncomfortable. If you really don't want to look at the MILLIONS of examples of transitional species. That is fine. You can ignore every piece of hard core evidence you want. That is fine. But just because you do not want to take the years it takes to study all of it and to even try to understand how it works you don't need to get all worked up about the facts.
So what we cannot recreate millions of years in a -*test*-('") tube for you, I am really sorry. Is that what it takes for you to accept something? Isn't 100's of years millions of examples you yourself can go touch, look at and put together how you want enough? I don't care if you accept the theory at true or not but don't diss it just because you don't want to take the time to research it. Copying and pasting things from other pages is not doing research or even trying to learn.
I have only listed a few examples. Showing you that it does happen. Examples that are easy to understand. There are millions of pieces of evidence, not from anything Darwin did. He got a lot wrong. But he got one thing right and that is what we remember him for.
Either way you are just going on rants from what other people have told you. I am talking about what people have shown me and you can look at too. Look at the physical evidence not what people just tell you. If you come to any other conclusion other than Natural Selection is what has been and still is going on, tell me. State your reasons from the evidence at hand, your conclusions from the evidence at hand and why every scientist in the world for the last 100 years is off their rocker in thinking that Natural Selection is crazy talk
admin- 09-09-2006
| QUOTE |
Originally Posted by CraftierPantz no achilles, im talking about the transitional forms of like fossils, the in between stages, say for example, of a ape and a human, where are the hapes? |
There is not transitional form inbetween apes and humans. It is not a ape - hape- human lineage.
Think of it like a V with apes and humans at the tops of the V and something else, not living anymore at the bottom of the V. It doesn't even have to look like an ape or a human.
These transitional forms have been found all over. If you want examples read the previous posts. Or you can just type it in to google if you want pictures. Just remember it isn't just animals. Plants and microorganisms have transitional species as well. There is a whole kindom of microorganisms that went extince in the transitions between prokayotes and eukaryotes. That's millions of species just there.
admin- 09-09-2006
1. Really everyone needs to stop thinking of Darwin. Guess what. We know a lot more now than we did yesterday. We will know more tommorow. The theory of evolution does not start and stop with darwin. It was first proposed from evidence he collected and then every scientist in the world looked at that evidence and every piece of evidence since. Same stuff.
2. The Big-Bang thing, wich has been adressed in another thread where I posted to a link in Science with evidence supporting has NOTHING to do with Evolution. Nor does it have anything to do with the start of life. It deals with how life changes from "simple" organisms to "complex" organisms in response to enviromnetal changes. This can go the other way as well. Attributes can be lost in an organism over time. It is a two way street. It is all stuff you guys can look at yourself and come to whatever conclusion you want. Just the rest of us in the field have already come to one.
ekattan- 09-09-2006
Dude you haven't answered my question. You are in genetics and you know how complex proteins and DNA is right, so answer my question.
Do you actually think it's possible man's so complex genetic material actually derived from a singled celled organism?
admin- 09-09-2006
| QUOTE (ekattan @ September 09, 2006 09:50 am) |
Dude you haven't answered my question. You are in genetics and you know how complex proteins and DNA is right, so answer my question.
Do you actually think it's possible man's so complex genetic material actually derived from a singled celled organism? |
Yes. I do. I can go into detail as well.
DNA - RNA - mRNA - Proteins - Folding - Use.
This is the basic Dogma of Genetics.
Each one of these things can affect any of the others in this linkage and vice-versa. DNA can affect mRNA that is formed and Proteins can keep DNA from being used. They are made in this order but the products can change by enhancing, activating, deactivating, slowing speeding etc the rest of the items in that chain. Now keep in mind I am leaving a few links out of this chain for simplicities sake.
Now imagine that the DNA part is millions of items long. This gives you millions of RNA combos. Wich gives you millions of mRNA combos. Now at this point, imagine that you can shuffle that deck of DNA to get different things. You don't have to retain yourself to the order of the DNA. Now imagine that this DNA changes randomly and repeats and elongates itself randomly. The changes are infinate. And those millions of combos keep increasing exponentially till you get to the product.
So there are almost infinite possiblities, but they are all regulated to what works well in an environment. Changes still occur but if they don't work, they don't get passed on. Infinate possibilities + Random change = something that will work better than its predessesors. Now add into that about 4.5 billion years of time. With billions of random changes happening every second. Not minute or hour. Some will have an effect, some don't, some make stuff better, some worse, some equally as good of a product.
This is what leads to genetic diversity.
Gentic diversity leads to improvements, dissadvantages, and different stuff. Advantages are "selected" for because they are more successfull than others. So you get more and more advantages till you get us. But keep in mind that we are only as evolved as everything else around us. A tree is amazingly complicated. A salamander has far more DNA than us but when you look at it you think simple organism. We just have different advantages that have developed to allow us to live in different niches on earth, at this time, in this environment. It is the environment at this time that selects for the advantages that are good now. Walking upright may not be in our best interest in a million years. So we will either go extinct due to something or somebody with those odd deformities you see on t.v. like the guy from Africa that walks on all fours because of a skeletal "defect" will have a great advantage over us.
Ok that is enough for now.
PS:
Even single celled organisms have evolved, they have been selected for speed and simpicity. No introns, 20 minute reproductive cycle. They are kicking our asses in efficiency but we can adapt (not evolve) much better to changes to environmental change. Bacteria cannot do that as well.
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