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Invention of microscope is most important one to find out microorganisms. Basing on this several inventions were made, which break the unsolved problems since 400 years. This credit goes to Antonie van Leeuwenhoek who invented single lens powerful microscope, which could magnify the object 300 times. His curiosity and skill of making powerful lenses were the secrets of this invention of powerful microscope.

Dr. Alexander Flemming observed some fungi were preventing the growth of bacteria in his experiments. He separated the substances released by the fungus and tested it on some other disease causing bacteria. This substance also killed many other diseases causing bacteria and named it as Pencillin. The discovery of pencillin paved the way to the discovery of many antibiotics like streptomycin, erythromycin etc. After several attempts Ross suddenly realized that he used the wrong species of mosquitoes in his experiments. His assistant brought larvae, which hatched to several dappled winged mosquitoes. Delighted with this capture Ross identified Anopheles mosquito is the host for malarial parasite.

Rhizobium is the name of the nitrogen fixation bacteria in the root nodules?

1. Lacto bacillus bacteria is responsible for the formation of curd. 

2. When we add buttermilk to luke warm milk it takes 2 or 3 hours time to form curd. 

3. But if we add buttermilk to chilled milk it takes more time or curd would not form.

4. Curdling indicates that the increase in number of bacteria in milk. 

5. In chilled condition the number of bacteria do not increase in number there by curd would not be formed.

If we add a few drops of butter milk to chilled milk 

the milk will not turn into curd. It is because, cold milk won’t provide the conditions to grow lactobacillus. Hence, curd will not be formed.

1. Preservation prevents spoilage of food. 

2. It helps us to store food for a longer time without spoilage. 

3. Variety of food items may be available in off seasons also.

Bacteria and protozoa are two examples of microbes.

Both bacteria and protozoa are very small which can be visible through a microscope so they are called microbes.

Conidiospores.

Arthropods are joint legged organisms which causes the diseases like scabies.

1. Microbiology plays a very vital important role in identifying the cause of diseases by the discovery of several microorganisms. 

2. Microbiology helps in the preparation of diseases caused by microorganisms by the discovery of their transmission methods.

After six hours the milk in the bowl A converted into curd. This conversion is happened by fermentation. Fermentaion is one kind of enzymatic action in anaerobic respiration. Fermentation needs the help of microbes like yeast or some other bacteria. This process occurs at a particular temperature. Because of enzymes are inactive at low and high temperatures. Hence the milk in bowl A converted into curd by the bacterium Lactobacillus.

1. Cooking of food items makes the proteins in the food materials coagulate. 

2. It also degrades the protective surface of the food. 

3. Thus the cooked foods can be easily inhabited by microoganisms. 

4. So they can be spoiled in less time than the uncooked food.

No, it is not right. Doctor prescribed anitbiotics for five days. Because the doctor knows that the correct days of the recovering of her illness. After three days of usage she stopped taking antibiotics. But her illness is not completely recovered. It is breaking out after some time. So it is not right.