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  4. Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups

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Q. Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups

AIPMTAIPMT 2010Biological Classification

Solution:

There are two major groups of monerans archaebacteria (ancient bacteria) and eubacteria (true bacteria). Eubacteria is of further two types - bacteria and cyanobacteria. Thermoacidophiles are a type of archaebacteria which live in extremely acidic environment (pH 2) that have extremely high temperatures (upto 110°C). They are found in hot sulphur springs. Some of the eubacteria are also famous for living under the most hostile environment like salt pans, petroleum pans, spilled oil, hot springs, sulphur springs, snow, etc.