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455 questions in this collection · Page 40 of 46
Question 391 of 455
📘 CLASS XII
Microbes In Human Welfare
Antibiotics are one of the most significant discoveries of the ____ century.
Antibiotics produced by microbes are regarded as one of the most significant discoveries of the twentieth century.
Question 392 of 455
📘 CLASS XII
Microbes In Human Welfare
The use of biofertilisers is receiving large pressure due to problems associated with the overuse of ____ fertilisers.
There is a large pressure to switch to organic farming – the use of biofertilisers... due to problems associated with the overuse of chemical fertilisers.
Question 393 of 455
📘 CLASS XII
Microbes In Human Welfare
The bacterium *Clostridium butylicum* is a producer of ____ acid.
*Clostridium butylicum* (a bacterium) of butyric acid.
Question 394 of 455
📘 CLASS XII
Microbes In Human Welfare
Lipases are used in detergent formulations for the removal of ____ stains.
Lipases are helpful in removing oily stains from the laundry.
Question 395 of 455
📘 CLASS XII
Microbes In Human Welfare
In the aeration tank, the microbes consume the major part of the ____ in the effluent.
While growing, these microbes consume the major part of the organic matter in the effluent.
Question 396 of 455
📘 CLASS XII
Microbes In Human Welfare
After secondary treatment, the effluent is generally released into natural water bodies when the ____ is significantly reduced.
Once the BOD of sewage or waste water is reduced significantly, the effluent is then passed into a settling tank.
Question 397 of 455
📘 CLASS XII
Microbes In Human Welfare
In the rumen of cattle, the methanogens help in the breakdown of cellulosic material, which is necessary for cattle ____.
In rumen, these bacteria help in the breakdown of cellulose and play an important role in the nutrition of cattle.
Question 398 of 455
📘 CLASS XII
Microbes In Human Welfare
The technology of biogas production in India was developed by IARI and ____.
The technology of biogas production was developed in India mainly due to the efforts of IARI and Khadi and Village Industries Commission (KVIC).
Question 399 of 455
📘 CLASS XII
Microbes In Human Welfare
The Ladybird beetle is used to control aphids, while dragonflies are used to control ____.
Ladybird... and Dragonflies are useful to get rid of aphids and mosquitoes, respectively.
Question 400 of 455
📘 CLASS XII
Microbes In Human Welfare
The fungus *Trichoderma* species are effective biocontrol agents of several plant ____.
*Trichoderma* species... are effective biocontrol agents of several plant pathogens.