Answer these questions
1.How are carriers harmful to us?
2.What is the role of bacteria in increasing the soil fertility?
3.What is the difference between Rhizobium and cyanobacteria in the way of fixing nitrogen for the plants?
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Answer:
1. they sit on the garbage and the bacteria stick to their bodies and then they sit on our food so the bacteria is transferred to our food and we eat it and we fall sick
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2
Answer:
1A>Carriers take with them many harmful microorganisms or pathogens. They play a great role in transferring these pathogens to a healthy person, by sitting on the food items, or directly transferring the pathogens inside the body of a person. Hence they are harmful to us.
2A>Bacteria enrich the soil with various nutrients such as Nitrogen, Phosphorous and improve the quality and texture of the soil. ... Azotobacter and Azospirillum are free-living bacteria which absorb free nitrogen present in soil, air and convert them into amino acids and enrich the soil.
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