Q

Most living organisms cannot survive at temperature above 45^0C. How are some microbes able to live in habitats with temperatures exceeding 100^0C?

3. Most living organisms cannot survive at temperature above 450C. How are some microbes able to live in habitats with temperatures exceeding 1000C?

Some microbes can survive in temperatures as high as $100^{^{o}}C$ because these microbes are adapted to live at high temperatures. These organisms contain enzymes which can work at high temperature. This is why they can be found at thermal vents, hot springs etc. The organisms which are unable to survive high temperatures have enzymes that gats deactivated at high temperatures.