1. Tikka disease is occurs in______
A.Tobacco
B.Rice
C.Sugar cane
D.Ground nut
2.soil fertility is increased by this bacteria?
A.Rhyzobium
B.Azitobacter
C.A and B
D.None
3.Anti biotic penicillin is obtained from __________
A.virus
B.fungus
C.bacteria
D.none
Answers
Answer:
Tikka Disease is a common disease in groundnut caused by Cercospora arachidicola and Cercospora personata. In the diseased condition, many circulars spots appear on the surface of the leaf. The conidia of the fungus present in the soil or those present in the fruit shell are the source of infection
.So the correct answer is Groundnut.
Nitrogen-fixing bacteria are microorganisms that are capable of transforming atmospheric nitrogen into fixed nitrogen (inorganic compounds which can be used by the plants).
Two kinds of nitrogen-fixing bacteria are recognized. They are:
1. Free-living (non-symbiotic) bacteria: cyanobacteria (or blue-green algae), Anabaena and Nostoc and genera such as Azotobacter, Beijerinckia, and Clostridium.
2. Mutualistic (symbiotic) bacteria: Rhizobium, associated with leguminous plants; Frankia, associated with certain dicotyledonous species; and certain Azospirillum species, associated with cereal grasses.
Thus, the correct answer is option (D).
Answer: (2)
Antibiotics influence and interfere with the fungus’ metabolic process and ultimately kill it. Penicillium notatum or P. chrysogenum (fungus) is used to produce the antibiotic penicillin.
Answer:
1) D.Ground nut
2) A.Rhyzobium
3) B.fungus