Question:
Which one of the following is an aerobic non-symbiotic nitrogen-fixing bacteria?
Which one of the following is an aerobic non-symbiotic nitrogen-fixing bacteria?
Show Hint
Nitrogen-fixing bacteria:
- Aerobic non-symbiotic: Azotobacter, Beijerinckia.
- Anaerobic non-symbiotic: Clostridium.
- Symbiotic: Rhizobium, Bradyrhizobium.
- Aerobic non-symbiotic: Azotobacter, Beijerinckia.
- Anaerobic non-symbiotic: Clostridium.
- Symbiotic: Rhizobium, Bradyrhizobium.
Updated On: Aug 27, 2026
- Azotobacter
- Clostridium
- Rhizobium
- Beijerinckia
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of nitrogen-fixing bacteria.
Step 2: Detailed Explanation:
Azotobacter (A) is an aerobic non-symbiotic nitrogen-fixing bacterium.
It is free-living and fixes nitrogen under aerobic conditions.
Other nitrogen-fixing bacteria:
- Clostridium (B): Anaerobic non-symbiotic.
- Rhizobium (C): Symbiotic (legumes).
- Beijerinckia (D): Aerobic non-symbiotic but less common than Azotobacter.
Thus, Azotobacter is the aerobic non-symbiotic nitrogen-fixer.
Step 3: Final Answer:
Thus, Azotobacter is an aerobic non-symbiotic nitrogen-fixing bacteria, which corresponds to option (A).
[0.5cm]
This question tests knowledge of nitrogen-fixing bacteria.
Step 2: Detailed Explanation:
Azotobacter (A) is an aerobic non-symbiotic nitrogen-fixing bacterium.
It is free-living and fixes nitrogen under aerobic conditions.
Other nitrogen-fixing bacteria:
- Clostridium (B): Anaerobic non-symbiotic.
- Rhizobium (C): Symbiotic (legumes).
- Beijerinckia (D): Aerobic non-symbiotic but less common than Azotobacter.
Thus, Azotobacter is the aerobic non-symbiotic nitrogen-fixer.
Step 3: Final Answer:
Thus, Azotobacter is an aerobic non-symbiotic nitrogen-fixing bacteria, which corresponds to option (A).
[0.5cm]
Was this answer helpful?
0
0
Top ICAR AIEEA Physical Sciences Questions
- According to Bray's Nutrient Mobility concept, which among following element is mobile in plants but immobile in soil?
- Which of the following nutrient is related with deficiency symptoms like discoloration of leaf buds, breaking and dropping of buds?
- The pF range of soft or friable consistency of soil is-
- The amount of organic matter in a soil with 'Value 0' according to Munsell colour system is-
- The most common 1:1 type of clay mineral in soil is-
View More Questions
Top ICAR AIEEA Pollution Questions
Match List-I with List-II.
List-I (Event) List-II (Observation) (A) Harvest Planning (I) Determining field boundaries and property lines accurately (B) Soil Sampling (II) Collecting soil samples at precise locations for analysis and management decisions (C) Boundary Mapping (III) Planning optimal routes for harvesting equipment to maximize efficiency (D) Pest Management (IV) Tracking pest populations and movements to inform control strategies Choose the correct answer from the options given below.
- Given below are two statements:
Statement (I): Application of nitrogenous fertilizer leads to $\text{N}_2\text{O}$ emission from the soil.
Statement (II): Nitrous oxide is present in large quantities compared to methane in the atmosphere and therefore processes higher potent danger.
In light of the above statements, choose the most appropriate answer from the options given below: - Increasing order of Water Use Efficiency.
(A). Drip Irrigation
(B). Pitcher pot Irrigation
(C). Surface Irrigation
(D). Sprinkler Irrigation
Choose the correct answer from the options given below: - Weed not found in rice crop is
- Given below are two statements, one is labeled as Assertion (A) and the other one is labeled as Reason (R).
Assertion (A) : The organochlorine pesticides accumulate in the fatty tissues in the human body.
Reason (R) : Organochlorine pesticides are chemically unstable and hydrophobic.
In light of the above statements, choose the most appropriate answer from the options given below.
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions