Biology questions
20584 published questions with worked solutions.
- In the biological treatment of sewage, the masses of bacteria held together by fungal filament to form mesh-like structures...
- What would happen if oxygen availability to activated sludge flocs is reduced?
- What gases are produced in anaerobic sludge digesters?
- The purpose of biological treatment of waste water is to
- During anaerobic digestion of organic waste such as in producing biogas, which one of the following is left undegraded?
- Biogas produced by fermentation of manure, sewage, cattle dung, etc predominantly comprises
- The technology of biogas production from cow-dung was developed in India largely by the efforts of
- Which of the following bacteria is present in the rumen of cattle?
- The residue left after methane production from cattle-dung is
- The percentage of methane in biogas is
- Pollution from animal excreta and organic waste from kitchen can be most profitably minimized by
- A common biocontrol agent for the control of plant diseases is
- Agriculture by using only biofertilisers is calledNot in NEET syllabus
- One of the major difficulties in the biological control of insect pest is that the
- Herbicides acts usually by
- Which of the following is common to Azospirillum, Anabaena, Nostoc and Oscillatoria?Not in NEET syllabus
- Which one of the following helps in absorption of phosphorus from soil by plants?
- Which of the following is not used in organic farming?Not in NEET syllabus
- A good example for organic fertilizer which improves phosphorus uptake is
- Mycorrhiza promotes plant growth byNot in NEET syllabus