By Ajay Anand
Lactobacillus is an example of bacteria.
Lactobacillus facilitates conversion of milk into yoghurt.
Yeast causes fermentation of many food items.
Fermentation is the process by which sugar solution changes into alcohol.
Yeast is added to batter to make fluffy cakes.
Fermentation also helps in production of alcohol.
Antibiotic is a substance which kills or stops the growth of bacteria.
Alexander Fleming discovered the antibiotic Penicillin in 1929.
Our body has the ability to fight diseases.
The defence-mechanism of our body produces antibodies to fight a disease-causing microbe which may enter our body.
Vaccine is made by a weak or killed strain of a disease-causing microbe.
When a vaccine is inoculated in the body, the body prepares antibodies against it.
Thus, the body learns and remembers how to fight with that microbe in future.
Edward Jenner discovered small pox vaccine in 1798.
He observed that people who were rearing cows did not suffer from small pox.
That observation led to the discovery of small pox vaccine.
Blue-green algae fix atmospheric nitrogen in soil.
Rhizobium bacteria live in root nodules of leguminous plants.
These bacteria help in nitrogen fixation in soil.
Thus, these microbes help in improving soil fertility.
Many microbes feed on dead remains of plants and animals.
Thus, these microbes play the role of decomposers.
Thus, microbes help in clearing organic waste from our surroundings.