Tag: microbes in human welfare

Questions Related to microbes in human welfare

BGA is chiefly used as fertilizer in

zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

  1. Wheat

  2. Paddy

  3. Mustard

  4. Gram

Show answer
Correct Option: B
Explanation:

BGA is chefly used as fertilizer in paddy fields for paddy crops.

Correct answer-B

A free living nitrogen fixing cyanobacterium which also forms symbiotic association with Azolla is?

zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

  1. Anabaena

  2. Nostoc

  3. Chlorella

  4. Tolypothrix

Show answer
Correct Option: A
Explanation:

Azolla forms a symbiotic association with Anabaena for nitrogen fixation.

Correct answer-A

Which of the following is used as a green manure?

zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

  1. Crotalaria juncea

  2. Azolla

  3. Hevea braziliensis

  4. Azadirachta juncea

Show answer
Correct Option: A

What are used as green manure?

zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

  1. Melilotus parviflora

  2. Lens esculenta

  3. Crotalaria juncea

  4. All the above

Show answer
Correct Option: D
Explanation:

Green manures are fertilizers consisting of growing plants that are ploughed back into the soil.All the above are good examples of green manure.

Correct answer-D

Azolla is used as biofertilizer as it has

zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

  1. Rhizobium

  2. Cyanobacteria

  3. Mycorrhiza

  4. Large quantity of humus

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Correct Option: B

Sesbania rostrate is preferred as green manure over other species because.

zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

  1. It grows quickly

  2. It has extensive root system

  3. It possesses nodules on both stem and roots

  4. It possesses leaf nodules

Show answer
Correct Option: A
Explanation:

Sesbania rostrate is mainly used as green manure to improve the fertility of the soil due to its fast growth, high biomass production and the ability to convert atmospheric nitrogen into a usable form for plants.

Azolla pinnate is allowed to grow in rice fields because.

zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

  1. It does not disturb photosynthesis of Rice plants

  2. It provides food to fish

  3. It provides aeration to standing water

  4. It contains Anabaena

Show answer
Correct Option: D
Explanation:

Azolla free-floating freshwater fern that harbors nitrogen-fixing cyanobacterium Anabaena azollae by symbiosis relationship in its dorsal leaves. It is capable of fixing atmospheric carbon dioxide and nitrogen and is known as a potent nitrogen fixer.

This nitrogen-fixing capacity helps the plant benefit in a positive manner with the increase in yield and size and it served as the nitrogen requirement for rice.

The most potent biofertilizer for sugarcane is?

zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

  1. Azotobacier

  2. Acetobacrer

  3. Clostridium

  4. Rhizobium

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Correct Option: A

Neurospora is a very good taxon for.

zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

  1. Biofertilizer

  2. Biological control

  3. Genetically studies

  4. Antibiotics

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Correct Option: A

Which one of the following pairs serve as biofertilizers?

zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

  1. Albgo and Nostoc

  2. Frankia and Nostoc

  3. Pseudomonas and E.Coli

  4. Aspergillus's and Actinomycetes

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Correct Option: A