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How could immune systems of animals and plants have evolved? Each immune system can recognize invading bacteria, viruses, and toxins. Each system can quickly mobilize the best defenders to search out and destroy these invaders. Each system has a memory and learns from every attack.
If the many instructions that direct an animal’s or plant’s immune system had not been preprogrammed in the organism’s genetic system when it first appeared on earth, the first of thousands of potential infections would have killed the organism. This would have nullified any rare genetic improvements that might have accumulated. In other words, the large amount of genetic information governing the immune system could not have accumulated in a slow, evolutionary sense (a). Obviously, for each organism to have survived, this information must have all been there from the beginning. Again, creation.
(a.) “We can look high or we can look low, in books or in journals, but the result is the same. The scientific literature has no answers to the question of the origin of the immune system.” Behe, p. 138.
“Unfortunately, we cannot trace most of the evolutionary steps that the immune system took. Virtually all the crucial developments seem to have happened at an early stage of vertebrate evolution, which is poorly represented in the fossil record and from which few species survive. Even the most primitive extant vertebrates seem to rearrange their antigen receptor genes and possess separate T and B cells, as well as MHC molecules. Thus has the immune system sprung up fully armed.” Avrion Mitchison, “Will We Survive?” Scientific American, Vol. 269, September 1993, p. 138.
[From “In the Beginning” by Walt Brown ]
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