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Originally posted by NegativeBeef
Since creationists love to claim that animals were created after their kind I have a very simple question. How do you determine which animals are part of which kind? For example, how do know that horses, zebras and donkeys are part of the same kind? Are cats and dogs the same kind? What about whales and cows? And how do you know that?
Originally posted by novastrike81
Originally posted by NegativeBeef
Since creationists love to claim that animals were created after their kind I have a very simple question. How do you determine which animals are part of which kind? For example, how do know that horses, zebras and donkeys are part of the same kind? Are cats and dogs the same kind? What about whales and cows? And how do you know that?
Oh look.. this thread again.
An easy way to understand a "kind" is that if it can interbreed successfully it is classified as a kind. So a horse, a zebra, and a donkey are all part of the same kind. Kind's can't interbreed though; i.e. a dog and a cat can't interbreed or whales and cows because they are their own kind. If you think they can go try and mate a cat and a dog and see if they can produce an offspring, or a whale and a cow. I bet you won't be able too.
Originally posted by NegativeBeef
Originally posted by novastrike81
Originally posted by NegativeBeef
Since creationists love to claim that animals were created after their kind I have a very simple question. How do you determine which animals are part of which kind? For example, how do know that horses, zebras and donkeys are part of the same kind? Are cats and dogs the same kind? What about whales and cows? And how do you know that?
Oh look.. this thread again.
An easy way to understand a "kind" is that if it can interbreed successfully it is classified as a kind. So a horse, a zebra, and a donkey are all part of the same kind. Kind's can't interbreed though; i.e. a dog and a cat can't interbreed or whales and cows because they are their own kind. If you think they can go try and mate a cat and a dog and see if they can produce an offspring, or a whale and a cow. I bet you won't be able too.
That's gotta be the most piss poor definition of "kind" i have ever seen.
How do you explain speciation then? When 2 (or more) groups of organism who could originally interbreed successfully evolve and can no longer interbreed at all? Wouldn't that be a change in kind? Something that creationists say is impossible? Speciation has been observed many times in nature and in the laboratory.
And what about organisms that don't breed? what kind would they be?
And I would also like to see you explain ring species: where species A can interbreed with species B and species B can interbreed with species C but species C can't interbreed with species A. This would mean that A and B are the same kind, B and C are the same kind, but A and C are not the same kind.
[edit on 10-5-2010 by NegativeBeef]
Three species of wildflowers called goatsbeards were introduced to the United States from Europe shortly after the turn of the century. Within a few decades their populations expanded and began to encounter one another in the American West. Whenever mixed populations occurred, the specied interbred (hybridizing) producing sterile hybrid offspring. Suddenly, in the late forties two new species of goatsbeard appeared near Pullman, Washington. Although the new species were similar in appearance to the hybrids, they produced fertile offspring. The evolutionary process had created a separate species that could reproduce but not mate with the goatsbeard plants from which it had evolved.
It's in the books go read it yourself. Why do you need a creationist to explain it to you when you already have the answers made up in your head to begin with?
I don't see any threads asking Evolutionists to post their ideas on why they think a certain way.
One thing that evolutionists often fail to consider is that all life forms on Earth do appear to have a common origin — a genetic starting point, if you will.
Are evolutionists trying to tell me that we carry the intact residual information to reproduce a monkey, or a duck, or a turtle, or a salamander, or even a fish in our genetic blueprint?
We could, theoretically, isolate the proper genetic sequence and pull a living dinosaur out of our human genome, yes? Or a trilobite. Or a rhododendron.
Doesn't it seem even remotely feasible that the "human genome" is not a human genome at all but is something more akin to a universal genome containing the blueprints for many, many different species of life, a genetic sequence perhaps deposited intact on Earth 3 billion years ago, and out of which sprang every form of life we can name?
Originally posted by novastrike81
To answer your ring species question I'll supply an example of your question.
Three species of wildflowers called goatsbeards were introduced to the United States from Europe shortly after the turn of the century. Within a few decades their populations expanded and began to encounter one another in the American West. Whenever mixed populations occurred, the specied interbred (hybridizing) producing sterile hybrid offspring. Suddenly, in the late forties two new species of goatsbeard appeared near Pullman, Washington. Although the new species were similar in appearance to the hybrids, they produced fertile offspring. The evolutionary process had created a separate species that could reproduce but not mate with the goatsbeard plants from which it had evolved.
This would be a great example of macroevolution and what evolutionists generally try to portray as macroevolution in action. The example above is not macroevolution, but is simply due to a single genetic event known as polyploidy. The original goatsbeards from Europe were standard diploid (two copies of each chromosome) plants. However, plants often do not undergo complete monoploidy during meiosis (during the formation of the sex cells, or gametes). This means that the gametes may remain diploid. When diploid gametes fuse, a new polyploid "species" is formed. No new information is created (Do you have twice as much information if you copy one book to produce an identical copy? No!), but the chromosomes are duplicated. The new "species" cannot produce viable offspring with the original species simply because of the difference in number of chromosomes. With goatsbeards, the process has happened more than once. Of course, the two "new" species have the same number of chromosomes and can produce viable offspring, since they are virtually identical.