18539.A biofertilizer which involves a pteridophyte host is
Rhizobium
Anabaena
Clostridium
Azotobacter
18541.Biofertilizers include
Cowdung manure and farmyard waste
A quick growing crop ploughed back
BGA / Anabeana and Azolla
All the above
18542.If wheat field is inoculated with Rhizobium
Soil will become nitrogen rich
No effect on soil nitrogen
Soil will be depleted of nitrogen
Soil will become rich in calcium
18543.A free living nitrogen fixing cyanobacterium which can also form symbiotic association with Azolla is
Nostoc
Anabaena
Tolypothrix
Gleocapsa
18545.A piosnous mushroom among the following is
Agaricus bisporus
Morchella esculenta
Hydnum sp.
Amanita sp.
18546.A plant effective in ensuring safe delivery ans prevent abortions is
Azadirachta
Ocimum
Adhatoda
Asparagus
18548.A well known “Kumari Asav“ is obtained from
Aloe vera
Azadirachta indica
Ocimum sanctum
Asparagus racemosus
18552.Aloe vera cures cough and by taking mixture of
leaf juice and crushed poppy seeds
leaf juice and tumeric
Leaf juice, honey and tumeric
Leaf juice and cumin
18553.One of the following is not a benefit of vermicompost
Protection of water bodies from pollution
Reduction in microbialo activity
increased availability of minerals
increased hydration and aeration
18555.Azolla is used as biofertilizer because it
Multiplies very fast to produce massive biomass
Has association of nitrogen fixing Rhizobium
Has association of nitrogen fixing cyanobacteria
Has association of mycorrhiza
18557.Spawning of fishes is induced by injecting females with
Progesterone
Prostaglandin
FSH and LH
Estrogen
18558.Crop rotation is carried out for
Increasing acidity of soil
Decreasing fertility of soil
Increasing fertility of soil
All the above
18559.Diabetic patients are advised to take more of mushrooms as they contain
low protein
High protein
More minerals
Low carbohydrates
18562.Farmers have reported 50% higher yield of rice by using biofertilizer
Azolla pinnata
Legume – Rhizobium symbiosis
Cyanobacteria
Mycorrhiza
18565.Insect deterrent chemical extracted from neem (margosa) is
Thiocarbamate
Pyrethroid
Azadirachtin
Allethrin
18567.When two unrelated individuals or lines are crossed, the performance of F1 hybrid is often superior to both its parents. This phenomenon is called
Metamorphosis
Heterosis
Transformation
none of these
18569.Leghaemoglobin takes part in
Energy release
Stimulating growth of Rhizobium
N2 absorption
Supply of oxygen
18570.Leguminous plants are able to fix atmospheric nitrogen through symbiotic process. Which is not true about it?
Leghaemoglobin scavenges oxygen and is pinkish in colour
Nitrogenase is insensitive to Oxygen
Nodules act as site for nitrogen fixation
Enzyme nitrogenase catalyses conversion at atmospheric nitrogen to NH3
18573.Most famous nitrogen fixing bacterium / biofertililzer is
Nitrobacter
Nitrosomonas
Nitrococcus
Rhizobium
18574.Most suitable fertilizer of paddy fields is
Mycorrhiza
Azotobacter and clostridium
Symbiotic and nonsymbiotic cyanobacteria
Rhizobium
18575.Which one of the following is free living nitrogen fixing bacterium
Azotobacter
Anabaena azollae
Pseudomonas
Cyanobacterium
18577.Mycorrhiza is helpful in
Synthesis of food
Getting nutrients from soil
Providing resistance against different regulators
Increase the fertility of soil
18578.Nitrogen fixation is
Nitrogen - Ammonia
Nitrogen - Nitrates
Nitrogen - Amino acids
Both A and B
18580.Mushroom cultivation consists of steps
Spawning - composting - Harvesting - casing
Casing - composting - harvesting - Spawning
Cropping - casing - Spawning - composting
Composting - Spawning - Casing - harvesting
18581.Sterilisation of straw bundles during mushroom cultivation is known as
Pasteurization
Harvesting
composting
Spawning
18582.Study on medicinal plants based on ancient literature and investigations in modern days is called
Pharmacy
Pharmacology
Economic botany
Ethnobotany
18584.The best fertilizer for paddy is
Azolla pinnata
Bacillus megatherium
Rhizobium meliloti
Bacillus polymyxa
18586.The plant which yields a tonic from its roots for overcoming debility and enhance longevity of life is
Aloe vera
Adhatoda vasica
Asparagus racemosus
ocimum sanctum