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Member (Idle past 1434 days) Posts: 20714 From: the other end of the sidewalk Joined: |
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Author | Topic: MACROevolution vs MICROevolution - what is it? | |||||||||||||||||||||||||||||||||||||||
PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
quote: I've seen how the word is used in the Bible and there is nothing that suggests that it is anything much more specific than the English "kind", which could easily refer to species or even breeds. If you have contrary evidence now would be a good time to produce it.
quote: Which written word ? Am I expected to believe anything written by a creationist ?
quote: It must ?
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
quote: I'm pretty sure that's not the standard Strongs. But then placing men over scripture is at the heart of your religion.
quote: Well maybe you would like to take more care to get your facts right.
quote: I have two. The first is that our universe is all of space-time. In that case there is no need for our universe to come from nothing because there was never a time when it did not exist. The second is that our universe is embedded in a larger space-time and is the consequence of a natural event.
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3
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quote: We know this is untrue because mutations will keep adding diversity. Even if diversity was completely lost a new mutation would bring in more diversity. This is completely obvious, has been explained to you repeatedly and simply denying it is hardly sensible.
quote: I don't think so. Showing that mutations have added variety without destroying species as you have claimed it would (another obvious absurdity) does not show a misunderstanding at all. It directly address an assertion that you made.
quote: Obviously it only holds up in a case where mutation stops. And the only known example of that is extinction.
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
quote: You're not getting it. Adding variety means that there is variety for selection to work on.
quote: Of course it can contribute. If the population has run out of diversity that is where the differing traits in a successor species will come from.
quote: Evolution requires both the loss and gain of genetic diversity. Not an overall sustained loss. That is why it will never end, short of the extinction of all life.
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3
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quote: Again you fail to see the obvious. Selection needs variety to work on. If there is no variety there it must be added. And it will be.
quote: More obvious nonsense. Even you agree that new species may be formed by evolution, and that is certainly not invented to support the obvious fact that mutations occur.
quote: More obvious nonsense. Obviously new species have formed without any sign of them reaching "genetic depletion". Obviously microevolution is evolution - and the pocket mice and the peppered moth are examples of microevolution based on the appearance of new variation. And equally obviously it is senseless to say that new variation cannot later become a defining trait of a new species (something that I remind you is based on observing that all - or the vast majority - members of a species have the trait - and something that would be dropped if it were no longer true) So, it IS true that we can have evolution and new species even if mutation is continually providing new variation. It is a clear fact that mutations occur and add new variation - which may be selected. Unless you insist that no new species have ever formed then you must accept - at least if you are honest - that mutation has not prevented it. How can it be any clearer that you are wrong ?
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
quote: You are wrong to think that the inability of species to interbreed is due to a loss of genetic variation. If you don't understand that then you really aren't in a position to accuse anyone else of failing to understand your argument.
quote: Funny how you focus only on the points where there is agreement and completely ignore the disagreements. It's as if you have no confidence at all in the points where we disagree.
quote: Surely - as I have pointed out before - the arrival of additional variations contributes to speciation. Variation is the resource that selection requires, so if it were to run out selection would cease. The fact that it is continually replenished is what allows evolution to continue.
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
As usual you ignore the point. And you are wrong in a very significant way. Because variety is added evolution can produce more new species - with a far greater array of differences than it could without.
Yes, you need selection to get from variation to a distinct new phenotype - but you can't have selection without variation - which you can hardly deny.
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
quote: By the obvious means, mutation of course. While in principle it is possible for the same mutation to occur in both populations it isn't likely, still less for all of them to occur in both populations.
quote: By only counting loss of alleles, not gain, you are missing the most likely source of genetic incompatibility. Not to mention the effects of chromosomal rearrangements. It should be obvious that genetic incompatibility within a population is a disadvantage, while genetic incompatibility with a population that is never encountered is not. Thus a gradual accumulation of new variations that maintain compatibility with the local population is the most likely explanation. This is confirmed by the evidence HBD has introduced, showing that simply removing alleles does not produce loss of interfertility as we would expect anyway.
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
quote: But you are arguing about it, asking questions and insisting on your own idea of how it happens. And getting angry when people disagree and produce evidence for a contrary view.
quote: If that was the case you wouldn't have spent years arguing about it. No, you are arguing about more than that - and that is where the trouble lies.
quote: Maybe it does, but reduced genetic diversity is not even a likely cause of the loss of interfertility.
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
Evidence of what ? That reduced genetic diversity is NOT a likely cause of the loss of interfertility ? I provided some in my previous message Message 675
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
quote: You haven't proven that. In fact it's been disproven. Really, why do you come out with these obviously false claims ?
quote: Hardly. The rate would need to be zero for you to be right.
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
This is just ridiculous. So long as there is diversity we can have selection. If new variations are continually arriving diversity will always be available. Even if all diversity were removed new variations would bring it back.
How can you not see that ? The fuel analogy illustrated it perfectly.
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
quote: Hardly. You may not like the way the evidence points but it needs to be considered if any real understanding is to be had.
quote: You could get a more homogenous population from a mixed group of dogs by relaxing selection and letting them breed freely. Homogeneity is not the point. Fixation of particular traits is - in speciation. But you say you aren't interested in that.
quote: And you still just don't get it. Instead of relying on your own "infallible" opinions at least think about the objections. You are so obviously wrong it isn't funny.
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
quote: It takes mutation and selection to get evolution. That's basic to the subject, and if you haven't realised that by now that's just too bad.
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PaulK Member Posts: 17828 Joined: Member Rating: 2.3 |
quote: Oh but it is. Your argument proves that.
quote: That there was sufficient "built in diversity" - to,explain even the evolution you accept - is an assumption on your part. Whereas we know that mutation is real.
quote: Selection - using the term correctly - is necessary for adaptive change. But without mutations providing variation for it to work with it runs out quite quickly - as YOU argue. That's why there are limits to how far you can change a breed. Really, when you say mutation isn't needed you say that your argument is even more wrong than everyone else already says. You can't have it both ways.
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