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Which one of the following is not a nitr...

Which one of the following is not a nitrogen-fixing organism ?

A

Anabaena

B

Nostoc

C

Azotobacter

D

Pseudomonas

Text Solution

Verified by Experts

The correct Answer is:
D
Pseudomonas is not a nitrogen-fixing bacteria. Pseudomonas is a saprophytic bacteria. Pseudomonas are used for biodegradation of organic pollutant like petroleum spillage. Azotobacter is a free living nitrogen fixing bacteria. Anabaena and Nostoc are free living nitrogen fixing cyanobacteria.
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Knowledge Check

  • Which one of the following groups are not analogous organs?

    A
    Wings of birds and wings of butterfly
    B
    Eye of octopus and eye of mammals
    C
    Flippers of penguin and flippers of dolphin
    D
    Thorns of bougainvilla and tendril of cucurbita

  • Which of the following is not involved in nitrogen fixation ?

    A
    Pseudomonas
    B
    Azotobacter
    C
    Anabeana
    D
    Nostac

  • Which of the following is not involved in nitrogen fixation?

    A
    Pseudomonas
    B
    Anabaena
    C
    Nostac
    D
    Azotobacter

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