The free-living,aerobic,and saprotrophic $N_2$-fixing microbe is
- AAzotobacter
- BRhodospirillum
- CRhizobium
- DAnabaena
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Similar Questions
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:
Match List-$I$ with List-$II$.
List-$I$ List-$II$ $A$. Spherical $I$. Vibrio $B$. Rod $II$. Cocci $C$. Comma $III$. Spirilla $D$. Spirillum $IV$. Bacilli
Choose the correct answer from the options given below:
| List-$I$ | List-$II$ |
| $A$. Spherical | $I$. Vibrio |
| $B$. Rod | $II$. Cocci |
| $C$. Comma | $III$. Spirilla |
| $D$. Spirillum | $IV$. Bacilli |
Choose the correct answer from the options given below:
The main difference between Gram-positive and Gram-negative bacteria lies in the composition of
MediumAIPMT 2001
View SolutionIn bacteria,which of the following statements is correct regarding their genetic material?
Medium
View SolutionTransfer of $DNA$ from one bacterium to another by contact is known as:
Easy
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