Why is Thermus aquaticus used in PCR?

After heat shocking, how do you recover the bacteria back to it's original state? Edit View Insert Format Tools Table 12pt v Paragraph BIU AV ...

The following table depicts characteristics of five prokaryotic species (1-5). Use the information in the table to answer the following question. Species 1 Species 5 None Trait Plasmid Gram Staining Results Nutritional Mode Species 2 None Species 3 R Species 4 IF Positive Positive Negative Negative Negative Chemohetero- Chemoauto- troph Chemohetero- Chemohetero- Photoauto- troph Anaerobic troph troph troph Aerobic Specialized methanotroph Metabolic (obtains carbon Pathways and energy from methane) Anaerobic methanogen Anaerobic alcoholic fermentation Anaerobic lactic nitrogen fixation acid fermentation and aerobic photosystems I and II Other Features All of the species shown have a cell wall that consists partly of an outer membrane of lipopolysaccharide EXCEPT Internal membranes Fimbriae Flagellum Pili Thylakoids species 1 only species 2 only species 3, 4, and 5 species 1 and 2 only 0 O 0 0

If you notice on your agar plate that there are more than one color of colonies-- What does this mean? What should you do? Can you use this plate for the identification of an unknown bateria?