Description : A nitrogen-fixing microbe associated with Azolla in rice fields is (1) Tolypothrix (2) Spirulina (3) Anabaena (4) Frankia
Last Answer : (3) Anabaena
Description : A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is (a) Tolypothrix (b) Chlorella (c) Nostoc (d) Anabaena.
Last Answer : (d) Anabaena.
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 mismatch : (1) Rhodospirillum - Mycorrhiza (2) Anabaena - Nitrogen fixer (3) Rhizobium - Alfalfa (4) Frankia - Alnus
Last Answer : (1) Rhodospirillum - Mycorrhiza
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 : 83. Which one of the following is wrong statement ? (1) Nitrosomonas and Nitrobacter are chemoautotrophs (2) Anabaena and Nostoc are capable of fixing nitrogen in free-living state also (3 ... living conditions (4) Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins
Last Answer : Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins
Description : The common nitrogen-fixer in paddy fields is (a) Rhizobium (b) Azospirillum (c) Oscillatoria (d) Frankia.
Last Answer : (b) Azospirillum
Description : Which of the following pairs is of unicellular algae? (a) Laminaria and Sargassum (b) Gelidium and Gracilaria (c) Anabaena and Volvox (d) Chlorella and Spirulina
Last Answer : (d) Chlorella and Spirulina
Description : A water-fern, which is used as a green manure in rice fields, is (a) Salvinia (b) Mucor (c) Aspergillus (d) Azolla
Last Answer : (d) Azolla
Description : The biofertilizers are (a) Anabaena and Azolla (b) cow dung, manure and farmyard waste (c) quick growing crop ploughed under soil (d) none of these.
Last Answer : (a) Anabaena and Azolla
Description : Which of the following organisms is used as a biopesticide ? (l) Azolla (2) Anabaena (3) Rhizobium (4) Trichoderma
Last Answer : (4) Trichoderma
Description : Which one of the following plants are used as green manure in crop fields and in sandy soils? (a) Crotalaria juncea and Alhagi camelorum (b) Calotropis procera and Phyllanthus niruri (c) Saccharum munja and Lantana camara (d) Dichanthium annulatum and Azolla nilotica
Last Answer : (a) Crotalaria juncea and Alhagi camelorum
Description : The nitrogen fixing bacterium found on root surface of rice
Last Answer : Ans.Azospirillum
Description : Nitrogen fixing bacteria make combination with cells of the roots of - a) Pulses b) Rice c) Wheat d) Sugarcane
Last Answer : a) Pulses
Description : Nitrogen fixation in root nodules of Alnus is brought about by (a) Frankia (b) Azorhizobium (c) Bradyrhizobium (d) Clostridium
Last Answer : (a) Frankia
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 : Consider the following four statements (A - D) and select the option which includes all the correct ones only. (A) Single cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins, etc. (B) B ody ... C) and (D) (c) Statement (B), (C) and (D) (d) Statement (A) and (B)
Last Answer : (d) Statement (A) and (B)
Description : The richest sources of vitamin B12 are (a) goat’s liver and Spirulina (b) chocolate and green gram (c) rice and hen’s egg (d) carrot and chicken’s breast.
Last Answer : (a) goat’s liver and Spirulina
Description : Azolla increases soil fertility for – (1) maize cultivation (2) wheat cultivation (3) barley cultivation (4) rice cultivation
Last Answer : (4) rice cultivation Explanation: The nitrogen-fixing capability of Azolla has led to it being widely used as a biofertiliser for increasing the productivity of rice fields. When rice paddies ... can be inoculated with Azolla., which then quickly multiplies to cover the water, suppressing weeds.
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 : Due to which of the following organism, yield of rice is increased? (a) Sesbania (b) Bacillus popilliae (c) Anabaena (d) Bacillus subtilis
Last Answer : (c) Anabaena
Description : Besides providing N Azolla is used for weed control in a). Wheat b). Rice c). Castor d). Linseed
Last Answer : b). Rice
Description : Azolla increases soil fertility for (1) maize cultivation (2) wheat cultivation (3) barley cultivation (4) rice cultivation
Last Answer : rice cultivation
Description : Which of the following species does not have the ability to fix atmospheric nitrogen? (a) Azotobactor (b) Anabaena (c) Nostoc (d) Spirogyra
Last Answer : (d) Spirogyra
Description : Which aquatic fern performs nitrogen fixation? (a) Azolla (b) Nostoc (c) Salvia (d) Salvinia
Last Answer : (a) Azolla
Description : Frankia form symbiotic association with
Last Answer : Frankia form symbiotic association with
Description : Name a microbe used for the production of Swiss cheese. -Biology
Last Answer : answer:
Description : What microbe that causes influenza?
Last Answer : Feel Free to Answer
Description : Microbe used for biocontrol of pest butterfly caterpillars is (a) Saccharomyces cerevisiae (b) Bacillus thuringiensis (c) Streptococcus sp. (d) Trichoderma sp.
Last Answer : (b) Bacillus thuringiensis
Description : Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct? (a) Yeast – Statins (b) Acetobacter aceti – Acetic acid (c) Clostridium butylicum – Lactic acid (d) Aspergillus niger – Citric acid
Last Answer : (c) Clostridium butylicum – Lactic acid
Description : Which of the following is wrongly matched in the given table? Microbe Product Application (a) Streptococcus Streptokinase Removal of clot from blood vessel (b) Clostridium butylicum Lipase ... Cyclosporin A Immuno- suppressive drug (d) Monascus purpureus Statins Lowering of blood cholesterol
Last Answer : (b) Clostridium butylicum Lipase Removal of oil stains
Description : For retting of jute the fermenting microbe used is (a) methanophilic bacteria (b) butyric acid bacteria (c) Helicobacter pylori (d) Streptococcus lactin.
Last Answer : b) butyric acid bacteria
Description : In a eukaryotic microbe, those sections of a primary RNA transcript that will NOT be translated are called a. Introns. b. Anticodons. c. ―Jumping Genes.‖ d. Exons.
Last Answer : a. Introns.
Description : A microbe that is a microaerophilic mesophile would grow optimally at and a. high 02; 30°C b. low 02; 20°C c. no 02; 30°C d. low 02; 37°C
Last Answer : d. low 02; 37°C
Description : Can you explain the Haber-Bosch nitrogen fixing process?
Last Answer : Here is the most complete description of the reaction that I've found. Yes, ammonia (NH3) is the end result. First, hydrogen is derived from natural gas by another process (described in the ... and hydrogen which allows them to combine with less total energy than they would need to combine directly.
Description : Name some non-symbiotic nitrogen fixing prokaryote. -Biology
Description : Nitrogen fixing bacteria is useful in growing which crop? -Do You Know?
Description : $ Nitrogen fixing bateria always live in symbiosis. ! Symbiosis occurs between the organisms of the same species.
Last Answer : $ Nitrogen fixing bateria always live in symbiosis. ! Symbiosis occurs between the organisms of the same species. ... D. If both As and R are wrong.
Description : Select the correct statement: (a) Legumes are incapable of fixing nitrogen (b) Legumes fix nitrogen through bacteria living in fruits root (c) Legumes fix nitrogen only by bacteria present in nodules (d) None of the above
Last Answer : Ans. (c)
Description : Non leguminous nitrogen fixing trees
Last Answer : Ans. Alnus nepalensis
Description : Nitrogen fixing tree
Last Answer : Ans. Leucaena leucocephala
Description : Free-living nitrogen fixing microorganisms are - (1) Rhizobia (2) Soil fungi (3) Vesicular arbuscular mycorrhiza (4) Blue green algae
Last Answer : (1) Rhizobia Explanation: Rhizobia are soil bacteria that fix nitrogen (diazotrophs) after becoming established inside root nodules of legumes. Rhizobia require a plant host; they cannot independently fix nitrogen. In general, they are Gram-negative, motile, non-sporulating rods.
Description : Nitrogen fixing bacteria found in the root nodules of leguminous plant is:- (1) Saprophytic (2) Parasitic (3) Symbiotic (4) Autotrophic
Last Answer : (3) Symbiotic Explanation: Many legumes have root nodules that provide a home for symbiotic nitrogenfixing bacteria called rhizobia. This relationship is particularly common in nitrogen-limited conditions. .
Description : Nitrogen fixing bacteria is useful in growing which crop?
Last Answer : Legume
Description : Write an example of nitrogen fixing algae?
Last Answer : Cyanobacteria
Description : Name two nitrogen fixing bacteria?
Last Answer : Rhizobium & Azetobactor
Description : What is meant by nitrogen fixing bacteria?
Last Answer : The bacteria that convert nitrogen of the air into compounds of nitrogen and thus increase fertility of the soil are called nitrogen fixing bacteria.
Description : The most thoroughly studied of the known bacteria- plant interactions is the (a) cyanobacterial symbiosis with some aquatic ferns (b) gall formation on certain angiosperms by Agrobacterium (c) ... stems by nitrogen fixing bacteria (d) plant growth stimulation by phosphate- solubilising bacteria.
Last Answer : (b) gall formation on certain angiosperms by Agrobacterium
Description : Which one of the following statements is correct? (a) Legumes fix nitrogen only through the specialized bacteria that live in their roots. (b) Legumes fix nitrogen independently of the specialized ... specialized bacteria that live in their leaves. (d) Legumes are incapable of fixing nitrogen.
Last Answer : (a) Legumes fix nitrogen only through the specialized bacteria that live in their roots.
Description : A prokaryotic autotrophic nitrogen fixing symbiont is found in (a) Alnus (b) Cycas (c) Cicer (d) Pisum.
Last Answer : (b) Cycas