EASY
Earn 100
A heterocyst is a differentiated cyanobacterial cell that carries out nitrogen fixation.
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Important Questions on Microbes in Human Welfare in Our Everyday Life
MEDIUM
Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statements is not correct?
HARD
Which hormone/s is/are responsible for nodule formation?
EASY
To convert atmospheric nitrogen into organic compounds by micro-organisms is called _____nitrogen fixation.
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The common nitrogen fixer in paddy fields is
MEDIUM
Which one of the following is not a nitrogen-fixing organism?
HARD
Fill in the blank with the correct option from the bracket.
A prokaryotic autotrophic nitrogen-fixing symbiont is found in _____. (Cicer, Cycas, Pisum, Alnus)
EASY
Biofertilizers are microorganisms that bring about
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Mycorrhiza is a symbiotic association between fungal hyphae and _____ of the higher plant.
EASY
Which one of the following help in increased the yield of rice?
EASY
A bacterium found in root nodules of legume plants is _____ (rhizobium/azotobacter)
EASY
Find the odd one for not being used in organic farming.
MEDIUM
Mycorrhiza does not help the host plant in
HARD
Fill in the blank with the correct option from the bracket.
Organisms that fix nitrogen in aquatic habitats are _____.(green algae, cyanobacteria, Protozoa, diatoms)
EASY
An organism used as a biofertilizer for raising soyabean crops is
MEDIUM
Both Anabaena and Nostoc have special cells called _____, which can fix atmospheric nitrogen.
EASY
Identify the biofertilizers
EASY
Those microbes which are helpful in increasing the soil fertility are known as _____.
MEDIUM
_____ enzyme plays an important role in reducing nitrogen to ammonia during the nitrogen fixation process.
MEDIUM
_____ have red pigment in their roots. (Radish, Mustard, Soyabean, Maize)
EASY
Which of these is/are symbiotic N2 fixing organisms?
