Description : Farmers have reported over 50% higher yields of rice by using which of the following biofertilizer? (a) Cyanobacteria (b) legume-Rhizobium symbiosis (c) Mycorrhiza (d) Azolla pinnata
Last Answer : (d) Azolla pinnata
Description : Which of the following is non-symbiotic biofertilizer? (a) Anabaena (b) Rhizobium (c) VAM (d) Azotobacter
Last Answer : (d) Azotobacter
Description : Which one of the following pairs is not correctly matched? (a) Streptomyces - Antibiotic (b) Serratia - Drug addiction (c) Spirulina - Single cell protein (d) Rhizobium - Biofertilizer
Last Answer : b) Serratia - Drug addiction
Description : An organism used as a biofertilizer for raising soybean crop is (a) Azotobacter (b) Azospirillum (c) Rhizobium (d) Nostoc.
Last Answer : (c) Rhizobium
Description : Which of the following is used as Biofertilizer? a) Rhizobium b) Blue-green algae c) Azolla d) All of these
Last Answer : d) All of these
Description : How does Mycorrhiza serve as a biofertilizer? -Biology
Last Answer : answer:
Description : Which algae is used as biofertilizer in the production of crop paddy? -Do You Know?
Description : Zinc solubilizing bacterial biofertilizer is
Last Answer : Ans. Azozink
Description : Which algae is used as biofertilizer in the production of crop paddy?
Last Answer : Blue green algae
Description : Which of the following fern is an excellent biofertilizer? (a) Marsilea (b) Pteridium (c) Azolla (d) Salvinia
Last Answer : (c) Azolla
Description : Which one is not biofertilizer ? (A) Multiflex (B) PSB (C) Vermicompost (D) NADEP
Last Answer : (A) Multiflex
Description : Main function of biofertilizer is— (A) To increase chemical process (B) To increase physiological process (C) To increase biological process (D) To increase photosynthesis process
Last Answer : (C) To increase biological process
Description : Which of the following is Phosphate solubilizing biofertilizer a. Aspergillus b. Rhizopus c. Psudomonas d. All of these
Last Answer : d. All of these
Description : Main function of biofertilizer is a) To increase chemical process b) To increase physiological process c) To increase biological process d) To increase photosynthesis process
Last Answer : c) To increase biological process
Description : Select the biofertilizer in the following : (1) Compost (2) Ammonium sulphate (3) Cattle dung (4) Algae and blue-green algae
Last Answer : Algae and blue-green algae
Last Answer : Rhizobium belongs to the state of Monra.
Description : Rhizobium trifoli is applied for
Last Answer : Ans. Berseem
Description : Rhizobium leguminosarum is applied for
Last Answer : Ans. Pea, Lathyrus and Lentil
Description : Rhizobium japonicum culture is applied for crops
Last Answer : Ans. Soybean and Groundnut
Description : The essential element required by the N fixing bacterium Rhizobium
Last Answer : Ans. Mo
Description : Rhizobium fixes atmospheric nitrogen/ha to the soil
Last Answer : Ans. 50-100 kg
Description : Which of the following is/are examples for symbiotic association? (1) Algae - lichen (2) Plant roots - rhizobium bacteria (3) Both are right (4) Both are wrong
Last Answer : (3) Both are right
Description : Rhizobium is a kind of – (1) Photosynthetic bacteria (2) Symbiotic bacteria (3) Parasitic bacteria (4) Saprophytic bacteria
Last Answer : (2) Symbiotic bacteria Explanation: Rhizobia are soil bacteria that fix nitrogen after becoming established inside root nodules of legumes. They are the only nitrogenfixing bacteria living in a symbiotic relationship with legumes. Common crop and forage legumes are peas, beans, clover, and soy.
Description : Which of the following is also used as a Bio fertilizer? (1) Rhizobium (2) Azotobactar (3) Azospirillum (4) All of the above
Last Answer : (4) All of the above Explanation: Rhizobium, Azotobacter, Azospirillum and blue green algae are traditionally used as Bio fertilizers.
Description : Human insulin is being commercially produced from a transgenic species of (a) Rhizobium (b) Saccharomyces (c) Escherichia (d) Mycobacterium
Last Answer : (c) Escherichia
Description : Two bacteria found to be very useful in genetic engineering experiments are (a) Nitrobacter and Azotobacter (b) Rhizobium and Diplococcus (c) Nitrosomonas and Klebsiella (d) Escherichia and Agrobacterium.
Last Answer : (d) Escherichia and Agrobacterium.
Description : The Ti plasmid, is often used for making transgenic plants. The plasmid is found in (a) Azotobacter (b) Rhizobium of the roots of leguminous plants (c) Agrobacterium (d) Yeast as a 2 mm plasmid.
Last Answer : (c) Agrobacterium
Description : Which of the following is the pair of biofertilizers? (a) Azolla and BGA (b) Nostoc and legume (c) Rhizobium and grasses (d) Salmonella and E.coli
Last Answer : (a) Azolla and BGA
Description : An example of endomycorrhiza is (a) Nostoc (b) Glomus (c) Agaricus (d) Rhizobium.
Last Answer : (b) Glomus
Description : The common nitrogen-fixer in paddy fields is (a) Rhizobium (b) Azospirillum (c) Oscillatoria (d) Frankia.
Last Answer : (b) Azospirillum
Description : Which one of the following is not a biofertiliser? (a) Agrobacterium (b) Rhizobium (c) Nostoc (d) Mycorrhiza
Last Answer : (a) Agrobacterium
Description : Which one of the following helps in absorption of phosphorus from soil by plants? (a) Glomus (b) Rhizobium (c) Frankia (d) Anabaena
Last Answer : (a) Glomus
Description : Select the mismatch. (a) Rhodospirillum – Mycorrhiza (b) Anabaena – Nitrogen fixer (c) Rhizobium – Alfalfa (d) Frankia – Alnus
Last Answer : (a) Rhodospirillum – Mycorrhiza
Description : Select the correct group of biocontrol agents. (a) Nostoc, Azospirillium, Nucleopolyhedrovirus (b) Bacillus thuringiensis, Tobacco mosaic virus, Aphids (c) Trichoderma, Baculovirus, Bacillus thuringiensis (d) Oscillatoria, Rhizobium, Trichoderma
Last Answer : (c) Trichoderma, Baculovirus, Bacillus thuringiensis
Description : ___ is the example of associative, nonsymbiotic nitrogen fixing organism. (A) Rhizobium (B) Azorhizobium (C) Pseudomonas ‘ (D) Azospirillum
Last Answer : (C) Pseudomonas ‘
Description : What is Azofication (a) It is also known as composite fixation of nitrogen. (b) It is also known as free fixation of nitrogen (c) It is also known as nitrogen fixed by Rhizobium bacteria ` (d) It is also known as nitrogen gain through rains or snow
Last Answer : (a) It is also known as composite fixation of nitrogen.
Description : What culture should be given priority in groundnut cultivation? 1) Mycorrhiza 2) Rhizobium 3) Phosphobacteria 4) Azospirillum]
Last Answer : 2) Rhizobium
Description : A non-photosynthetic aerobic nitrogen fixing soil bacterium is (a) Rhizobium (b) Clostridium (c) Azotobacter (d) Klebsiella.
Last Answer : (c) Azotobacter
Description : Which of the following is free-living aerobic non- photosynthetic nitrogen-fixing bacterium? (a) Nostoc (b) Azospirillum (c) Rhizobium (d) Azotobacter
Description : One of the free-living, anaerobic nitrogen-fixeris (a) Beijerinckia (b) Rhodospirillum (c) Rhizobium (d) Azotobacter.
Last Answer : b) Rhodospirillum
Description : Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere? (a) Aerobic nitrate oxidation and nitrite reduction (b) ... fixation by Rhizobium in root nodules of legumes (d) Anaerobic ammonium oxidation and denitrification
Last Answer : (d) Anaerobic ammonium oxidation and denitrification
Description : What culture should be given priority in groundnut cultivation? a. Mycorrhiza b. Rhizobium c. Phosphobacteria d. Azospirillum
Last Answer : b. Rhizobium
Description : All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia (a) can induce root nodules on many plant species (b) can fix ... its host plant through root hair deformation and stimulates cell proliferation in the host's cortex
Last Answer : (b) can fix nitrogen in the free-living state
Description : Which Rhizobium species is used in soyabean a. R.japonicum b. R. trifoli c. R.Phaseoli d. None of these
Last Answer : a. R.japonicum
Description : Symbiotic nitrogen fixing bacteria is — a. Azotobacter b. Azospirillum c. Rhizobium d. None of these
Last Answer : c. Rhizobium
Description : Rhizobium fixes nitrogens in the roots of _____, so they don't need to be fertilized; in fact they add nitrogen to the soil. a. corn b. legumes c. wheat d. grasses e. oats
Last Answer : b. legumes
Description : Which of the following organisms is used as a biopesticide ? (l) Azolla (2) Anabaena (3) Rhizobium (4) Trichoderma
Last Answer : (4) Trichoderma
Description : ______ helps in fixation of nitrogen in rice field in association with root of Cycas plant. a) rhizobium b)fungus c)cyano bacteria d)bacteria
Last Answer : c)cyano bacteria
Description : 3. Which bacterium is used in the production of insulin by genetic engineering? a. Saccharomyces b. Rhizobium c. Escherichia d. Mycobacterium
Last Answer : Ans: Escherichia
Description : Select the mismatch : (1) Rhodospirillum - Mycorrhiza (2) Anabaena - Nitrogen fixer (3) Rhizobium - Alfalfa (4) Frankia - Alnus
Last Answer : (1) Rhodospirillum - Mycorrhiza