Beacuse ... deinococcus - thermus is a phylum of bacteria that are highly resistance to environmenta hazards and known as extremophiles dinococcus include two families (1) deinococcaceae and 2) trueperaceae with three genera (1)deinococcus (2) deinobacterium (3) trueperal The geneus include several species that are resistant to radiation and it is famous for their ability to eat nuclear waste and other toxic material it survive in the vaccum of space and extreme heat and cold -> thermales includes several genera are resitant to heat eg (marinithermus,meiothermus,oceanithermus,thermus , vulcanithermus, rhabdothermus,) the thermus aquatic are important in the development of pcr ( polymerase chain reaction) and repeated cycles of heating DNA to near boiling make it advantage to use a thermostable DNA polymerase enzyme Solution Beacuse ... deinococcus - thermus is a phylum of bacteria that are highly resistance to environmenta hazards and known as extremophiles dinococcus include two families (1) deinococcaceae and 2) trueperaceae with three genera (1)deinococcus (2) deinobacterium (3) trueperal The geneus include several species that are resistant to radiation and it is famous for their ability to eat nuclear waste and other toxic material it survive in the vaccum of space and extreme heat and cold -> thermales includes several genera are resitant to heat eg (marinithermus,meiothermus,oceanithermus,thermus , vulcanithermus, rhabdothermus,) the thermus aquatic are important in the development of pcr ( polymerase chain reaction) and repeated cycles of heating DNA to near boiling make it advantage to use a thermostable DNA polymerase enzyme.