7. What are the major groups of microorganisms? Discuss about them.
8. How are microbes useful to us? Write in about 100 words.
9. Communicable diseases are caused by microbes. Justify.
10. Discuss few methods of food
11. Briefly discuss the different steps of the nitrogen cycle.
12. Observe the chart carefully, and fill the gaps.
preservation
) po
F001
(e) Which
Answers
Answer:
Ans7 Microorganisms or microbes are microscopic organisms that exist as unicellular, multicellular, or cell clusters. Microorganims are widespread in nature and are beneficial to life, but some can cause serious harm. They can be divided into six major types: bacteria, archaea, fungi, protozoa, algae, and viruses.
Ans 8 Microorganisms help in the production of many food items, making medicines, keeping the environment clean, in manufacturing and in research. Let us learn about microorganisms and its uses. Bacteria are the key players here.
Ans 9 Communicable diseases are illnesses caused by viruses or bacteria that people spread to one another through contact with contaminated surfaces, bodily fluids, blood products, insect bites, or through the air.
Ans 10Among the oldest methods of preservation are drying, refrigeration, and fermentation. Modern methods include canning, pasteurization, freezing, irradiation, and the addition of chemicals.
Ans 11 In general, the nitrogen cycle has five steps:
In general, the nitrogen cycle has five steps:Nitrogen fixation (N2 to NH3/ NH4+ or NO3-) Nitrification (NH3 to NO3-) Assimilation (Incorporation of NH3 and NO3- into biological tissues) Ammonification (organic nitrogen compounds to NH3)
hope it helps you
mark as brainliest answer