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frogman2x
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The evolution of milk secretion and its ancient origins. [Animal. 2012] - PubMed - NCBI
Just one of many actual scientific research papers on the origin of mammary glands.
That is the u sual evo respone. They just dogmatically stated that it happened but offered no evidence that caused it to happen.
Correct. That is why you cannot get evolution from variation (or mutations) alone. You need several mechanisms working together to produce a different species. But one must first have variation or there can be no evolution at all.
You need more than variation. You need for a characteristic that neither parent had to pop up in the kid. You can't get a characteristic witrhout the gene for it.
I think of variation as being like the fuel in a vehicle. Fill your tank with gas, and you still won't go anywhere without doing a few other things as well--such as starting the engine and releasing the brake.
But those other things won't get you anywhere either, if you don't have fuel in the tank.
So variation is where we begin the story of how creatures evolve.Biology does not work that way.
It doesn't particularly matter what the first cell was, so long as it had the capacity to replicate its genome and to do so with high, but not perfect fidelity. What scientists are searching for is not so much the first cell, but the last common ancestor of the current generation of living creatures.It not only matters, it is crucial to know. If you don't know, you don't know if it had he capicity to replicate its genome. Not only that, it did have the capicity to replicate its genome, but not the genome of another life form. You don't even know what the next life for was. You are walking in the dark and making all kinds of predictions, none of which can be proven.
Names are not much help at this stage, but it is called LUCA (last universal common ancestor).
You dont know that either. What did hte forst life form evolve into?
Did it have the necessary genome to produce a life form other than what it was?
If you don't know what it was, you dont know what it had or didn't have. Guessing is not real science.
Depends on how you view "life form". And at what point you start to define a variation as a different species.
It doesn't matter. You must have a mechanism that allows a charistic to appear in the offspring that neither parent had a gene for.
At some point the descendants of the LUCA divided into two groups; one became the Archaea, the other became the Bacteria. And everything else proceeds from these. Both groups have shown the capacity to develop numerous variations and to branch out into different species.
I hate to keep repeating myself, but wheres the evidence? Please don't just uotes some evo that said it happend. Because of the gene pool of the parents there will always be variation but the offspirng will ALWASY be the same exact species as it prents. You know it's that old "after its kind" thing, which canbe proven scientifically.
This is where you need more background in both genetics and evolution. Yes, all descendants of rabbits will be rabbits, according to the theory of evolution.This is where you need more background in both genetics and evolution. Genetics teach that without the gene for a characteristic, the offsprng CANNOT acquire the characteristic. If al rabbits remain rqabbits, where is evolution?
They may come to look very different from other rabbits, but they will still have traces of being rabbits. All ancestors of rabbits, OTOH, were not rabbits.
Anothe statement for which you hve no scientific evidence, and you just said "all rabbits will be rabbits according to evolutin."
Rabbits themselves are part of a larger group and came into existence as their non-rabbit ancestors developed varying lineages that went their separate ways.
Anothe dogomatic stateme for which you offer no evidence. That is the usual evo rhetoreic.
On the genetics side, if rabbits with stronger legs survive longer, they are more likely to survive long enough to reproduce--perhaps several times. So the genetic combination which gave them stronger legs will remain in the gene pool.(Are you sure you understand what a gene pool is?)
Let me assure you Inderstand it. This is not about understanding the gene pool. It is about understanding genetics.
It might be that some of one rabbit's children will have weaker legs, but the genes will still be there in other rabbits and in the siblings of those rabbits, and if the rabbits with stronger legs keep on having more surviving and reproducing offspring than others, that variant will keep spreading through the gene pool.
Of course but they will all come out rabbits.
Parents do not have a gene pool. They have a genome. I think you had better learn the difference between gene, genome and gene pool.
I think you need to learn that the kids CANNOT have a characteristic that was not in the gene pool of the parents.
More evo rhetoric for which you offer not biological evidence.Yes, all children are the same species as their parents. It takes much more than one generation (usually) for part of a population to become a different species. Speciation is usually a slow process of separating the population into non-breeding groups.
Yes, it can. Remember that changes in genes occur usually occur as the genome is replicating. And the only changes that count for evolution are those that occur in the germ cells.
Teh only changes in genes is through a mutation. Otherwise they remain the same. So if the genome is replicating, it is replicating withing the genome, not outside of it. Tht process is not a mechanism for one species to evolve into anothe species.
When you were conceived, you had two copies of your genome: one from your mother and one from your father. When the zygote from which you developed split into two cells, you then had four copies of your genome. And when those cells split, you then had eight. Now you have trillions of cells in your body and all of them have a copy of the genome you inherited from your father and a copy they inherited from your mother.
Of course ant that is why I came out homo-sapian and why my son is homo-sapian and why his childeren are homosapian. It provoes "after its kind."
But, wait, copies of genomes are not always perfect copies. Many of your cells will not have an exact copy of the genome you got from your father. There will be differences. Same with the copies of the copies of the copies of the genome you originally got from your mother. So if you were to compare the DNA in one of your cells with the DNA in a different cell, the chances are that they would not exhibit the same DNA sequence in several respects. <<
Right again. I am taller than my father and my son is shorter than I am. That is variation, but it does not a mechanism for evolution into anothe species.
And so it is possible that a child will have a characteristic which neither of its parents had.
You know very well that there are dormant genes that may not come out in the next generaltion, but the gene was in the parents gene pool and when it is combined with the proper gene, the characteristic will come out in the ofspring.
Again, this shows complete confusion about the process of evolutionary change. You actually don't know what the theory of evolution really says about it. Yes, you can get another species without jumping from one branch to another--in the same way that a branch puts out two or more twigs and a twig puts out two or more leaves.
Of course, agree with you or I am confused. So far all you have done make gogmatic statemend but offered not proof. Here is a good example---"you can get another species without jumping from one branch to another". Please provide the evidence. They twin puts out two leaves that are the same. Have you ever seen an oak leaf on an elm tree?
You can't get a hybrid in humans today, because there is only one species. Possibly in the future, if humans become few and widely separated from each other with no possible way to meet and interbreed, our species may divide into two or more separate species. Then there could be human hybrids.
Speculaton is not science.
It appears this was the case in the past. A sister group to H. sapiens was H. neanderthalensis. And some evidence suggests that there was some mating between the two groups.
Not true. neandedthals were h sapians. Of course the was some mating aand all f their kids wer h sapians also.
Most new species do not occur through bringing two existing species together (hybridization) but through dividing one species into two or more groups that no longer interbreed with each other (speciation). I say most, because there are some instances, especially in plants, where new species have been produced via hybridization. So both scenarios are possible. However, it appears that most new species come about through cladistic speciation (one branch dividing into two).
You keep being dogmatic but fail to offer any evidence.
To get back to our rabbits. At some point in mammalian history, the mammalian main branch produced a branch that we now call the rabbit branch. Since the first rabbit branch was produced, it has divided and sub-divided into hundreds of different families and genera and species of rabbits. But, as required by the theory of evolution, all descendants of that first group of rabbits remain rabbits. Yet there are many, many different species of rabbits. So there was no need for any rabbits to jump to a non-rabbit branch to make new species of rabbits.
What was the rabbit before it was a rabbit? Any new specis of rabbit is still a rabbit. For evoluion to be true, that rabbit must jump(pun intended) into something other than a rabbit. What did rabbits evolve into? To bad you do not have a fossil record to prove it.
Well, I assume you have been to high school and possibly college, yet there are clearly basics you do not understand.
That is very condescending. Agree with me or you do not clearly understand the basics. IMO, you do not u nderstand the basics of genetics.
Now as to professional scientists, yes, I think they understand evolution. I don't think they reject it for scientific reasons.
The ceertainly do reject it on sciedntific reasons. That is their whole purpose in the dispute. If you can't do it on science, there is no use in discussing it.
I admire Todd Wood for being up-front about this. He certainly understands evolution (has a PhD in paleontology from Harvard) and agrees that evolution, from a scientific perspective, is a well-supported theory.
I admire Kenneth B. cumming who has a B.S. from Tufts university and a PhD from harvard and satudied under a leading evolutionists, Ernst Myer, and rejects evolution on a scientific basis. He also taught at Virginia Tech and the Univ of Wis(Eau Clair)
I'll get back to you on this in another post.
Good, bring your evidence.
Hey, even the first multi-cellular life did not have bones, so, of course, the early unicellular life did not.
That is the genetic problem for evolution.
But almost all cells have the capacity to secret minerals which can harden into bone or shell. Some do and some don't. You can be glad of that. After all, when you were a zygote, you did not have any bones either. So how did you get them?
Almost only counts in horseshoes and handgrandes and if you don' know what he first life for was, you don't know if it has that abiliy.
kermit
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