Both endospore and exospore show resistant properties which make them resistant to desiccation. These resistance characteristics involve relatively impermeable inner membrane of the spore which restricts toxic chemicals to access the spore core which includes most of the enzymes and DNA of the spore, the spore's outer layer like the thick protein implemented coat which function as a detoxifier and hence detoxifies the reactive chemicals and also dipicolinic acid which is present in high level and the low water content in the spore core which protects the macromolecules of core from the impacts of desiccation and heat.