Which of the following is NOT a biofertilizer?
Show Hint
- Mycorrhizae
- Rhizobium
- Azotobacter
- Agrobacterium
The Correct Option is D
Solution and Explanation
Biofertilizers are formulated carrier-based preparations containing living beneficial microorganisms that enhance soil fertility and nutrient uptake.
Step 2: Detailed Explanation:
Mycorrhizae (mobilize phosphorus and micronutrients), Rhizobium (symbiotic nitrogen fixation), and Azotobacter (free-living nitrogen fixation) are commercial agricultural biofertilizers.
Agrobacterium (e.g., A. tumefaciens) is a plant pathogenic bacterium causing crown gall disease and utilized in plant biotechnology as a natural genetic transformation vector, not as a biofertilizer.
Step 3: Final Answer:
Therefore, Agrobacterium is NOT a biofertilizer.
Top ICAR AIEEA Plant Sciences Questions
- Both plant and animal cells contain some small organelles called 'peroxisomes', which are dedicated to the metabolism of substances such as
- Chemicals that store energy for the majority of work within cells are called
- The longest phase during the eukaryotic cell cycle is
- The formula: [Sum of (Observed-Expected)$^2$/Expected] is also known as
- Human beings have a large-sized 'proteome'. The principal and more significant reason for this is-
Top ICAR AIEEA Microbiology Questions
- Choose the correct order of the following microbes based on their requirement of host - from dead to living
(A). Saprotrophs
(B). Biotrophs
(C). Hemibiotrophs
(D). Nectrotrophs - Given below are two statements, one is labelled as Assertion (A) and other labelled as Reason (R).
Assertion (A): The secondary spread of the pathogen propagules that are identical in virulence is mostly responsible for epidemics.
Reason (R): Secondary propagules are mostly asexually produced.
In light of the above statements, choose the correct answer from the options given below. Given below are two statements, one is labelled as Assertion (A) and other labelled as Reason (R).
• [Assertion (A):] Biotrophs can be easily cultured in artificial medium.
• [Reason (R):] Biotrophs lost their independent growth due to co-evolution with the host.
In light of the above statements, choose the most appropriate answer from the options given below:
Given below are two statements, one is labelled as Assertion (A) and other labelled as Reason (R).
• [Assertion (A):] Phytoplasma do not have cell wall and motility.
• [Reason (R):] Phytoplasma colonize phloem.
In light of the above statements, choose the correct answer from the options given below.
Given below are two statements:
• [Statement (I):] Bacteria need pre-existing openings or wounds on plants to initiate infection.
• [Statement (II):] Bacteria do not produce specialized infective structures.
In light of the above statements, choose the most appropriate answer from the options given below.
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?