Biological Classification And System Of Classification Question 105
Question: Bacteria which convert the nitrogen of the air to nitrogenous compounds are called
[CPMT 1974]
Options:
A) Nitrifying
B) Nitrogen fixing
C) Denitrifying
D) Putrefying
Show Answer
Answer:
Correct Answer: A
Solution:
Plants cannot use the atmospheric nitrogen directly. Certain bacteria are involved in the conversion of nitrogen into nitrate compounds in the soil.
Bacteria which convert atmospheric nitrogen into nitrogen compounds like ammonia are called nitrogen-fixing bacteria.
These bacteria make nitrogen available for the plants.
These are of 2 types, symbiotic nitrogen-fixing bacteria like Rhizobium and non-symbiotic nitrogen-fixing bacteria like Azotobacter.
BETA
