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Question

___ are the most ancient group of ogranisms on Earth.

A
Eubacteria
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B
Cyanobacteria
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C
Archaebacteria
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D
PPLO
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Solution

The correct option is C Archaebacteria
Archaebacteria is a group of primitive prokaryotes, which were the earliest organisms to have appeared on Earth. They are called extremophiles because they grow in extreme, inhabitable conditions. They are found in areas like hot geysers and hot air vents since they evolved when the Earth was extremely hot.

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