Microbes in Human Welfare questions
610 published questions with worked solutions.
- Nucleopolyhedroviruses (NPVs), used in biocontrol, belong to the broader group of viruses called
- Why are chemical pesticides gradually being replaced with biological alternatives in agriculture (as emphasised in NCERT)?
- Which of the following correctly describes the action of Bacillus thuringiensis-based bioinsecticides on target insects?
- Which group of organisms is predominantly exploited as biocontrol agents against plant pathogenic fungi in the root zone?
- Biological control methods, as a category, include the use of
- Which of the following statements correctly contrasts biofertilisers with biocontrol agents?
- Organisms that enrich the nutrient quality of soil are known as
- The major groups of organisms used as biofertilisers include bacteria, fungi, and
- Rhizobium forms a symbiotic association with the roots of
- Free-living nitrogen-fixing bacteria that enrich soil nitrogen content without forming a symbiotic relationship include
- Cyanobacteria used as biofertilisers, particularly in paddy fields, include
- Cyanobacteria add organic matter and fix atmospheric nitrogen in the soil, thereby increasing soil
- Which association, formed between a fungus and the roots of most vascular plants, helps in absorption of phosphorus from the soil?
- Glomus, a fungus forming mycorrhizal association with plant roots, is specifically used as a biofertiliser to enhance uptake of
- Besides increasing phosphorus absorption, mycorrhizal association also confers upon the host plant
- Which of the following correctly matches a biofertiliser group with an example?
- Match Column I with Column II. | Column I | Column II | |---|---| | (A) Mycorrhizae | (i) Azadirachtin | | (B) Bt toxin | (ii)...
- Which of the following is an advantage of using biofertilisers over chemical fertilisers?
- Excessive use of chemical fertilisers, in contrast to biofertilisers, can lead to
- Which of the following biofertilisers is particularly significant in enriching nitrogen content of waterlogged paddy fields?
Other chapters
Alcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAlternating CurrentAminesAnatomy of Flowering PlantsAncient Indian HistoryAnimal KingdomApplication of DerivativesArea Under CurveAromatic Compounds and Aryl HalidesAtomsBasic Mathematics and LogarithmBinomial TheoremBiodiversity and ConservationBiological ClassificationBiomoleculesBiotechnology and Its ApplicationsBiotechnology: Principles and ProcessesBody Fluids and CirculationBreathing and Exchange of GasesCell Cycle and Cell DivisionCell: The Unit of LifeChemical Bonding and Molecular StructureChemical Coordination and Integration