$Clostridium$ is an example of:
- AObligate aerobic nitrogen-fixing bacteria
- BFacultative nitrogen-fixing bacteria
- CNon-nitrogen-fixing bacteria
- DAnaerobic nitrogen-fixing bacteria
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The main difference between Gram-positive $(+ve)$ and Gram-negative $(-ve)$ bacteria lies in their $........$.
Match the organisms in Column-$I$ with habitats in Column-$II$.
Column-$I$ Column-$II$ $(a)$ Halophiles $(i)$ Hot springs $(b)$ Thermoacidophiles $(ii)$ Aquatic environment $(c)$ Methanogens $(iii)$ Guts of ruminants $(d)$ Cyanobacteria $(iv)$ Salty area
Select the correct answer from the options given below:
| Column-$I$ | Column-$II$ |
| $(a)$ Halophiles | $(i)$ Hot springs |
| $(b)$ Thermoacidophiles | $(ii)$ Aquatic environment |
| $(c)$ Methanogens | $(iii)$ Guts of ruminants |
| $(d)$ Cyanobacteria | $(iv)$ Salty area |
Select the correct answer from the options given below:
The only group of organisms capable of using inorganic compounds as a source of energy is ........
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View SolutionBacteria are not found in which of the following shapes?
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