Biological Classification And System Of Classification Question 22
Question: According to Bradley and Carr, the nitrogen fixation takes place in
Options:
A) Akinetes
B) Vegetative cells
C) Heterocysts
D) All the above
Show Answer
Answer:
Correct Answer: C
Solution:
Nostoc is a cyanobacterium. It has the ability to fix atmospheric nitrogen.
It converts nitrogen into ammonia. The heterocysts present in it are specialized for nitrogen fixation.
It contains enzyme nitrogenase. Nitrogenase is inactivated by oxygen. Hence, the heterocyst creates a micro anaerobic environment. Thus, the correct answer is ‘Heterocysts.’
BETA
