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1. Plural form of endospore.
2. I'm thinking transpermatic endospores are mutagenic and will survive wherever and whatever level of preconditioned environmental elements are in place and/or will rapidly mutate to the level of survival.
3. The endospores, however, were able to survive between 4 and 28 hours, even when exposed directly to the UV light.
4. Two of the strains of bacteria tested – Bacillus pumilus and Bacillus Nealsonii – are both commonly used in laboratory tests of extreme environmental factors and their effects on bacteria because of their ability to produce endospores when stressed.