The common nitrogen-fixer in paddy fields is
1. Azospirillum
2. Oscillatoria
3. Frankia
4. Rhizobium

Membrane-bound organelles are absent in
1. Streptococcus
2. Chlamydomonas
3. Plasmodium
4. Saccharomyces

Ringworm in humans in caused by
1. Fungi
2. Nematodes
3. Viruses
4. Bacteria

Single-celled eukaryotes are included in
1. Fungi
2. Archaea
3. Monera
4. Protista

A prokaryotic autotrophic nitrogen fixing symbiont is found in :
1. Alnus
2. Cycas
3. Cicer
4. Pisum

The Cyanobacteria are also referred to as
1. Protists
2. Golden algae
3. Slime moulds
4. Blue green algae

Maximum nutritional diversity is found in which of the following group?

A nitrogen-fixing microbe associated with Azolla in rice fields is :
1. Spirulina
2. Anabaena
3. Frankia
4. Tolypothrix

Nuclear membrane is absent in
1. Penicillium
2. Agaricus
3. Volvox
4. Nostoc

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