Heavy smokers or industrial workers exposed for a limited time to a chemical carcinogen that induces mutations in dna do not usually begin to develop cancers characteristic of their habit or...

Heavy smokers or industrial workers exposed for a limited time to a chemical carcinogen that induces mutations in dna do not usually begin to develop cancers characteristic of their habit or occupation until 10, 20, or even more years after the exposure. suggest an explanation for this long delay.