Microbes In Human Welfare Question 48
Question: Which of the following is common to Azospirillum, Azotobacter, Anabaena, Nostoc and Oscillatoria?
Options:
A) Prokaryotes
B) $ N_2 $ -fixers
C) Both [a] and [b]
D) Eukaryotes
Show Answer
Answer:
Correct Answer: C
Solution:
As the following examples of bacteria are anaerobic bacteria and they survive in absence of oxygen.
Azospirillum, Anabaena, Nostoc and Oscillatoria are all nitrogen fixing bio fertilizers. They are all prokaryotes.
Azospirillum are free living bacteria whereas Anabaena, Nostoc and Oscillatoria are cyanobacteria.
BETA
