Q. No.The common nitrogen-fixer in paddy fields is
1. Azospirillum
2. Oscillatoria
3. Frankia
4. Rhizobium
1. Azospirillum
2. Oscillatoria
3. Frankia
4. Rhizobium
Membrane-bound organelles are absent in
1. Streptococcus
2. Chlamydomonas
3. Plasmodium
4. Saccharomyces
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A prokaryotic autotrophic nitrogen fixing symbiont is found in :
1. Alnus
2. Cycas
3. Cicer
4. Pisum
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The Cyanobacteria are also referred to as
1. Protists
2. Golden algae
3. Slime moulds
4. Blue green algae
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Maximum nutritional diversity is found in which of the following group?
| 1. | Fungi | 2. | Animalia |
| 3. | Monera | 4. | Plantae |
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A nitrogen-fixing microbe associated with Azolla in rice fields is :
1. Spirulina
2. Anabaena
3. Frankia
4. Tolypothrix
Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?
1. Paramoecium and Plasmodium belong to the same kingdom as that of Penicillium
2. Lichen is a composite organism formed from the symbiotic association of an algae and a protozoan
3. Yeast used in making bread and beer is a fungus
4. Nostoc and Anabaena are examples of protista
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