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If you have a short attention span, ignore the explanation, and skip to the question at the end.
I figure it is probably impossible to oppose evolution if one has a good understanding of taxonomy. After all, every anti-evolutionist I have ever debated with demonstrated almost no understanding (or interest) in this subject whatsoever. What's more, any attempt to teach it to them only seems to result in their becoming more and more defensive as we proceed. But maybe that's just me. So I'll try again. But this time, I'm going to try to be systematic (pun intended). I prefer to do this in a series of questions and answers, (about three dozen in all) so I will give this explanation in interactive stages. Any creationist is welcome to respond. But I am particularly interested in reaching Oncedeceived and William Jay Schroeder.
First understand that in evolutionary Theory, the transformation of fish-to-amphibians, dinosaurs-to-birds, or apes-to-men are essentially nothing noteworthy; just a matter of incremental, superficial changes slowly compiled atop various tiers of fundamental similarities. Those successive levels of similarity represent taxonomic clades.
The biggest changes concern only the smallest parts, the initial, fundamental structures. And once in place, these are also the hardest things to change. This is because DNA controls the organization of cells at two levels. At the most direct level, it controls the structure of the cell itself. In this capacity, the genetic code has already been fine-tuned for about a billion years longer than any multicellular organisms even existed. Because of this, the systems and mechanisms within the cell have been refined for extreme efficiency, and the genetic replication of the cell itself is almost perfect. However, the second level of replication is not in the construct of the cell, but in the assembly of numerous cells into complex (and wildly variable) multicellular configurations. The genetic code is significantly more prone to error in this expanded arena, especially since so many different arrangements will work. In addition, mutations occuring in one cell will not be distributed system-wide unless inherited, so there will be variance just within any collective of a single type of cell. This means that the surface appearance of any organism may be dramatically different from its kin, but the foundational structures and mechanisms shared with them are much more difficult to change even over substantially longer periods of time. So there have been relatively few really significant macroevolutionary events since the dawn of life on this planet. All of them were a really long time ago, and most of them have been at the sub-cellular level, before there even were any multicellular anythings. Every other evolutionary stage is a comparatively trivial, inevitable consequence of an imperfect copying process amid variable environmental and reproductive pressures and endless functional possibilities..
The taxonomic concept of clades provides the reason why, whenever there evolves a new species of fly, the creationists get to say "but its still a fly". Of course it is. It has to be, and it always will be no matter what else it may evolve into later on. For one thing, the old fly and the new one will only be superficially different but fundamentally similar. But cladistically, everything that evolved from a fly is still a fly even if it doesn't look like a fly anymore. If a Japanese couple get married, and move to some other country, the bride may have a new name, and she may be classed in a new family. But she is still tied to her heritage. She is still a child of her homeland, and a member of her old family, and so will her descendants always be. The same concept applies in cladistics. Since a descendant can't evolve out of their ancestry, then everything that ever evolved from a fish is still a fish, and that includes horses, dinosaurs, and people.
While you're scratching your head over that, I'll explain the concept of clades. Most people view evolution as a tree, or more appropriately, a tumbleweed, where every limb leads to several branches, and each branch leads to several twigs. Clades are the names for the limbs, branches, and twigs. Clades are systematic structure of descendant groups within ancestral groups within even larger, [and usually older] ancestral groups. One example clade is Aves, "birds". A lesser clades is "ducks". All ducks are birds, meaning that all ducks are within the Avian clade. But not all birds are ducks because "birds" is a parent clade of which "ducks" are but a single sub-group.
At the same time, remember that no matter what a duck evolves into, creationists will still be able to say "but its still a bird." They don't realize this, but the problem with that is that birds are "still" dinosaurs too. Speaking in terms of parent and daughter species, even if you become something your parents were not, you're still doomed to remain whatever they were. Your children will be whatever you are, and whatever your parents were.
Now I'll introduce most basic [foundational] clades.
First, to be an organism, one must also be organic. All life on Earth is Carbon-based. Any Carbon-based molecule is considered organic largely because some carbon-based molecules were only known to exist when they were created by living organisms. If there is life on other worlds, it may or may not have DNA. But it will likely still be a Carbon-based "organism".
Next, to be an organism, one must also be alive. On Earth, everything we like to call "life" is also based on replicative RNA/DNA proteins. There are two main sub-categories of this, only one of which is actually considered to be alive, even though both can be killed, and killed by similar methods. Most biologists do not consider viruses to be alive because they lack metabolism. Metabolism means that cells can perform various chemical functions within themselves enabling them to maintain some level of homeostasis, a balanced internal environment.
Now for the first question about your acceptance of cladistics or of your place in taxonomy: As creationists, do you accept that, as a life-form, you are also an organic RNA/DNA protein-based metabolic organism? A simple answer is all I need, and we'll continue from there.
I figure it is probably impossible to oppose evolution if one has a good understanding of taxonomy. After all, every anti-evolutionist I have ever debated with demonstrated almost no understanding (or interest) in this subject whatsoever. What's more, any attempt to teach it to them only seems to result in their becoming more and more defensive as we proceed. But maybe that's just me. So I'll try again. But this time, I'm going to try to be systematic (pun intended). I prefer to do this in a series of questions and answers, (about three dozen in all) so I will give this explanation in interactive stages. Any creationist is welcome to respond. But I am particularly interested in reaching Oncedeceived and William Jay Schroeder.
First understand that in evolutionary Theory, the transformation of fish-to-amphibians, dinosaurs-to-birds, or apes-to-men are essentially nothing noteworthy; just a matter of incremental, superficial changes slowly compiled atop various tiers of fundamental similarities. Those successive levels of similarity represent taxonomic clades.
The biggest changes concern only the smallest parts, the initial, fundamental structures. And once in place, these are also the hardest things to change. This is because DNA controls the organization of cells at two levels. At the most direct level, it controls the structure of the cell itself. In this capacity, the genetic code has already been fine-tuned for about a billion years longer than any multicellular organisms even existed. Because of this, the systems and mechanisms within the cell have been refined for extreme efficiency, and the genetic replication of the cell itself is almost perfect. However, the second level of replication is not in the construct of the cell, but in the assembly of numerous cells into complex (and wildly variable) multicellular configurations. The genetic code is significantly more prone to error in this expanded arena, especially since so many different arrangements will work. In addition, mutations occuring in one cell will not be distributed system-wide unless inherited, so there will be variance just within any collective of a single type of cell. This means that the surface appearance of any organism may be dramatically different from its kin, but the foundational structures and mechanisms shared with them are much more difficult to change even over substantially longer periods of time. So there have been relatively few really significant macroevolutionary events since the dawn of life on this planet. All of them were a really long time ago, and most of them have been at the sub-cellular level, before there even were any multicellular anythings. Every other evolutionary stage is a comparatively trivial, inevitable consequence of an imperfect copying process amid variable environmental and reproductive pressures and endless functional possibilities..
The taxonomic concept of clades provides the reason why, whenever there evolves a new species of fly, the creationists get to say "but its still a fly". Of course it is. It has to be, and it always will be no matter what else it may evolve into later on. For one thing, the old fly and the new one will only be superficially different but fundamentally similar. But cladistically, everything that evolved from a fly is still a fly even if it doesn't look like a fly anymore. If a Japanese couple get married, and move to some other country, the bride may have a new name, and she may be classed in a new family. But she is still tied to her heritage. She is still a child of her homeland, and a member of her old family, and so will her descendants always be. The same concept applies in cladistics. Since a descendant can't evolve out of their ancestry, then everything that ever evolved from a fish is still a fish, and that includes horses, dinosaurs, and people.
While you're scratching your head over that, I'll explain the concept of clades. Most people view evolution as a tree, or more appropriately, a tumbleweed, where every limb leads to several branches, and each branch leads to several twigs. Clades are the names for the limbs, branches, and twigs. Clades are systematic structure of descendant groups within ancestral groups within even larger, [and usually older] ancestral groups. One example clade is Aves, "birds". A lesser clades is "ducks". All ducks are birds, meaning that all ducks are within the Avian clade. But not all birds are ducks because "birds" is a parent clade of which "ducks" are but a single sub-group.
At the same time, remember that no matter what a duck evolves into, creationists will still be able to say "but its still a bird." They don't realize this, but the problem with that is that birds are "still" dinosaurs too. Speaking in terms of parent and daughter species, even if you become something your parents were not, you're still doomed to remain whatever they were. Your children will be whatever you are, and whatever your parents were.
Now I'll introduce most basic [foundational] clades.
First, to be an organism, one must also be organic. All life on Earth is Carbon-based. Any Carbon-based molecule is considered organic largely because some carbon-based molecules were only known to exist when they were created by living organisms. If there is life on other worlds, it may or may not have DNA. But it will likely still be a Carbon-based "organism".
Next, to be an organism, one must also be alive. On Earth, everything we like to call "life" is also based on replicative RNA/DNA proteins. There are two main sub-categories of this, only one of which is actually considered to be alive, even though both can be killed, and killed by similar methods. Most biologists do not consider viruses to be alive because they lack metabolism. Metabolism means that cells can perform various chemical functions within themselves enabling them to maintain some level of homeostasis, a balanced internal environment.
Now for the first question about your acceptance of cladistics or of your place in taxonomy: As creationists, do you accept that, as a life-form, you are also an organic RNA/DNA protein-based metabolic organism? A simple answer is all I need, and we'll continue from there.