The major gas components of biogas are methane, carbon dioxide, and:
Bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide.
Question 142 of 455
📘 CLASS XII
Methanogens are bacteria that grow primarily under which condition?
Certain bacteria, which grow anaerobically on cellulosic material, produce large amount of methane.
Question 143 of 455
📘 CLASS XII
Biogas is used in rural areas primarily for:
The biogas thus produced is used for cooking and lighting.
Question 144 of 455
📘 CLASS XII
Which approach to pest control relies on natural predation rather than introduced chemicals?
In agriculture, there is a method of controlling pests that relies on natural predation rather than introduced chemicals.
Question 145 of 455
📘 CLASS XII
The Ladybird beetle is a natural predator used to control:
The Ladybird... [is] useful to get rid of aphids.
Question 146 of 455
📘 CLASS XII
The spores of Bacillus thuringiensis are effective against butterfly caterpillars because:
In the gut of the larvae, the toxin is released and the larvae get killed. (Note: Although the source does not state "alkaline," it confirms toxin release in the gut.)
Question 147 of 455
📘 CLASS XII
What characteristic makes Baculoviruses excellent candidates for species-specific insecticidal applications?
These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications.
Question 148 of 455
📘 CLASS XII
Cyanobacteria are classified as which type of organism based on their nutrient synthesis?
Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial environments.
Question 149 of 455
📘 CLASS XII
Which category of microbe plays a vital role in sewage treatment by consuming the major part of the organic matter in the effluent?
While growing, these microbes [aerobic flocs] consume the major part of the organic matter in the effluent.
Question 150 of 455
📘 CLASS XII
Which characteristic allows Lipases to be effective in detergents?
Lipases are helpful in removing oily stains from the laundry.
