Class XII · Biology practice

Microbes in Human Welfare MCQs

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455 questions in this collection · Page 46 of 46

Question 451 of 455
📘 CLASS XII

Microbes In Human Welfare

Biofertilisers are organisms that enrich the ____ quality of the soil.
Biofertilisers are organisms that enrich the nutrient quality of the soil.
Question 452 of 455
📘 CLASS XII

Microbes In Human Welfare

Cyanobacteria are autotrophic microbes that can fix atmospheric ____.
Cyanobacteria... many of which can fix atmospheric nitrogen.
Question 453 of 455
📘 CLASS XII

Microbes In Human Welfare

The overall goal of using biofertilisers is to reduce dependence on ____ fertilisers.
Farmers use these regularly in their fields to replenish soil nutrients and to reduce dependence on chemical fertilisers.
Question 454 of 455
📘 CLASS XII

Microbes In Human Welfare

The virus shown in Figure 8.2(a) is a ____.
Figure 8.2 (a) shows a bacteriophage.
Question 455 of 455
📘 CLASS XII

Microbes In Human Welfare

The microbial cultures grown on nutritive media are useful for studies on ____.
Such cultures are useful in studies on micro-organisms.
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