Answers

2014-03-07T19:09:53+05:30
1) Because bacteria are too small to classify and it needs more higher microscope to do that. 

2) All bacteria have the same nucleic acid in there body, so those thing are very hard too classify because it was too small and all look petty same for that acid in their body. 
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2014-03-07T19:11:54+05:30
IT IS NOT SEEN 
THEY ARE SMALL ORGANISMS
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