Modern farmers can increase the yield of Paddy up to 50% by the use of:
1. Cyanobacteria
2. Rhizobium
3. Cyanobacteria in Azolla pinnata
4. Farm yard manure
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAzolla is used in the cultivation of:
1. | Maize | 2. | Sorghum |
3. | Wheat | 4. | Rice |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following is true pair of biofertilizers:
1. Azolla and BGA
2. Nostoc and legume
3. Rhizobium and grasses
4. Salmonella & E. Coli
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following plants are used as green manure in crop fields and in sandy soils:
1. Crotalaria juncea and Alhagi camelorum
2. Calotropis procera and Phyllanthus niruri
3. Saccharum munja and Lantana camara
4. Dichanthium annulatum and Azolla nilotica
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe most thoroughly studied of the known bacteria-plant interactions is the:
1. | Gall formation on certain angiosperms by Agrobacterium |
2. | Nodulation of Sesbania stems by nitrogen-fixing bacteria |
3. | Plant growth stimulation by phosphate– solubilising bacteria |
4. | Cyanobacterial symbiosis with some aquatic ferns |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following pairs is not correctly matched:
1. Serratia – Drug addiction
2. Spirulina – Single-cell protein
3. Rhizobium – Biofertilizer
4. Streptomyces – Antibiotic
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA free-living nitrogen-fixing cyanobacterium that can also form a symbiotic association with the water fern Azolla is:
1. Chlorella
2. Nostoc
3. Anabaena
4. Tolypothrix
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyBacillus thuringiensis (Bt) strains have been used for designing novel:
1. Bioinsecticidal plants
2. Bio-mineralization processes
3. Biofertilizers
4. Bio-metallurgical techniques
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology