The notion of abundant "junk" DNA has been used to undermine the notion of design. The scientific trend however is that non-coding genetic material has been found to serve important purposes in the cycle of life.
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"And what of the other 98% of the genome? It has been assumed by many to be genetic junk, a massive accumulation of “code” that evolution has rendered superfluous. Now, however, scientists are discovering that the vast bulk of the DNA in our genomes, while it does not “code” for the specific RNA molecules that serve as templates for protein synthesis, do nevertheless perform various kinds of work."
