Question is ⇒ An example of a symbiotic nitrogen fixer is, Options are ⇒ (A) Azotobacter, (B) Beijerinckia, (C) Clostridium, (D) Rhizobium , (E) , Leave your comments or Download question paper.

Question is ⇒ An example of a symbiotic nitrogen fixer is, Options are ⇒ (A) Azotobacter, (B) Beijerinckia, (C) Clostridium, (D) Rhizobium , (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	An example of a symbiotic nitrogen fixer is
A.	Azotobacter [Wrong Answer]
B.	Beijerinckia [Wrong Answer]
C.	Clostridium [Wrong Answer]
D.	Rhizobium [Correct Answer]
View Answer 2 -1 Explanation:- Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

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⇒ The nonsymbiotic bacteria which fix nitrogen live in the soil independently are
Azotobacter
Clostridium
considerably less important in comparison to the symbiotic bacteria
all of the above

⇒ The phenomenon of commensalism refers to a relationship between organisms in which
one species of a pair benefits
both the species of a pair benefit
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⇒ Nitrifying bacteria can not be isolated directly by the usual techniques employed to isolate hetrotrophic bacteria. The reasons may be due to
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⇒ Syntrophism involves
exchange of nutrients between two species
exchange of nutrients among species
no exchange of nutrients between two species
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⇒ Which of the following is correct?
Mycorrhizae are fungi that form a mutually beneficial (symbiotic) relationship with plant roots
The fungi aid in transmitting nutrients and water to the plant roots
The increased nutrient availability from mycorrhizae is thought to be due to the additional absorbing surface provided by the fungi
All of the above

⇒ Nitrogen oxidation (nitrification)refers to the
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changing of atmospheric nitrogen (N₂) to nitrogen compounds
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⇒ The population of algae in soil is __________ that of either bacteria or fungi.
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⇒ Denitrification is
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⇒ The energy value of biogas is typically
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⇒ Which of the following is not the biofertilisers producing bacteria?
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⇒ A heterocyst is
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the progenitor of cyanobacterial vegetative cells
a cell that carries out oxygenic photosynthesis

⇒ Assimilative denitrification is done by
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⇒ __________ play a key role in the transformation of rock to soil.
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⇒ Denitrification may be distinguished as
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blue baby syndrome

⇒ The diagnostic enzyme for nitrogen-fixing organisms is
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⇒ For rapid decomposition by microbes, the substrate should have a C/N ratio of
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⇒ The transformation of nitrates to gaseous nitrogen is accomplished by microorganisms in a series of biochemical reactions. The process is known as
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⇒ The conversion of molecular nitrogen into ammonia is known as
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⇒ Nitrogen fixation by the microorganisms can be detected by adopting the approach of
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cultivating the microorganisms in the presence of nitrogen labeled with isotropic nitrogen
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⇒ The groups of bacteria which have the ability to fix nitrogen from air to soil are
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⇒ Degree of compost maturity can be assesed by
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⇒ An example of a symbiotic nitrogen fixer is
Azotobacter
Beijerinckia
Clostridium
Rhizobium

⇒ Nitrogen fixation
changes the free nitrogen (N₂) to a form usable by plants
especially changes nitrogen compounds, mostly amines such as NH₂
both (a) and (b)
fix the free nitrogen (N₂) by which it should not be usable by plants