1.D. Answer the following questions in brief.Why are viruses considere

1.	1.D. Answer the following questions in brief.Why are viruses considered as being at the 'borderline' between living andnon-living things?What is fermentation? How is this process useful in the food and beverageindustries?2.3.'In the absence of microorganisms the earth would become a heap of deadplants and animals.' Justify this statement.4.Munna observes that the yield of wheat, growing in his field, has reducedin the current year. He gets the soil tested and the report confirms thedeficiency of one particular nutrient. Accordingly, he is advised to growpeas after harvesting wheat.(i) Name the nutrient found insufficient.(ii) How doyou think growing peas will help in replenishing the soil?Why does it take less time to prepare curd in summers as compared topreparing it in winters?5.6.How are the following diseases transmitted:(c) Tetanus(d) Typhoidaria(b) Common cold
Answer» Answer: 1) Viruses do not GROW or reproduce by themselves, which makes them non-living. However, when a virus enters the living cell of an organism, it makes use of the resources in the host cell and starts reproducing. ... Due to this, viruses are considered to be on the borderline of the living and non-living. 2) Fermentation is the process of converting carbohydrates to alcohol or to organic acids using microorganisms, such as yeasts or bacteria. This process takes place when there are beneficial bacteria present that break down the starch and sugars in the food. 3) In the absence of microorganisms the earth would become a heap of DEAD plants and animals , because microorganisms helps in decomposing of the dead plants and animals , they work as a DECOMPOSERS, without them there will be no decomposing of the dead organisms , and hence lead to the health problems. 4) i) nitrogen ii) because peas' roots bacteria name rhizobium which do nitrogen fixation in the soil and nourished it. 5)At warm condition bacteria turn the milk into curd. So in summer the temperature is high and favourable for the bacteria growth. As a result, the bacteria multiply faster which leads to change the milk into curd. That iss why it takes more time in winter for the curd to set COMPARE to summer time. 6) a) by mosquito bite b) by AIR or sitting cold infected person c) cut or wound by iron substance d) by taking infected and impure eatable itens

1.D. Answer the following questions in brief.Why are viruses considered as being at the 'borderline' between living andnon-living things?What is fermentation? How is this process useful in the food and beverageindustries?2.3.'In the absence of microorganisms the earth would become a heap of deadplants and animals.' Justify this statement.4.Munna observes that the yield of wheat, growing in his field, has reducedin the current year. He gets the soil tested and the report confirms thedeficiency of one particular nutrient. Accordingly, he is advised to growpeas after harvesting wheat.(i) Name the nutrient found insufficient.(ii) How doyou think growing peas will help in replenishing the soil?Why does it take less time to prepare curd in summers as compared topreparing it in winters?5.6.How are the following diseases transmitted:(c) Tetanus(d) Typhoidaria(b) Common cold

Answer»

Answer:

1) Viruses do not GROW or reproduce by themselves, which makes them non-living. However, when a virus enters the living cell of an organism, it makes use of the resources in the host cell and starts reproducing. ... Due to this, viruses are considered to be on the borderline of the living and non-living.

2) Fermentation is the process of converting carbohydrates to alcohol or to organic acids using microorganisms, such as yeasts or bacteria. This process takes place when there are beneficial bacteria present that break down the starch and sugars in the food.

3) In the absence of microorganisms the earth would become a heap of DEAD plants and animals , because microorganisms helps in decomposing of the dead plants and animals , they work as a DECOMPOSERS, without them there will be no decomposing of the dead organisms , and hence lead to the health problems.

4) i) nitrogen

ii) because peas' roots bacteria name rhizobium which do nitrogen fixation in the soil and nourished it.

5)At warm condition bacteria turn the milk into curd. So in summer the temperature is high and favourable for the bacteria growth. As a result, the bacteria multiply faster which leads to change the milk into curd. That iss why it takes more time in winter for the curd to set COMPARE to summer time.

6) a) by mosquito bite

b) by AIR or sitting cold infected person

c) cut or wound by iron substance

d) by taking infected and impure eatable itens

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