Q 2. Look at the picture of bacteria given and answer the following questions
:
(a) Name the three different form of bacteria based on shapes.
(b) How many bacteria live in one gram of soil?
(c) Name the most useful and the most harmful bacteria.
(d) Name one bacteria that is useful to the farmers.
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Bacteria are microscopic, single-celled organisms that exist in their millions, in every environment, both inside and outside other organisms.
Some bacteria are harmful, but most serve a useful purpose. They support many forms of life, both plant and animal, and they are used in industrial and medicinal processes.
Bacteria are thought to have been the first organisms to appear on earth, about 4 billion years ago. The oldest known fossils are of bacteria-like organisms.
Bacteria can use most organic and some inorganic compounds as food, and some can survive extreme conditions.
A growing interest in the function of the gut microbiome is shedding new light on the roles bacteria play in human health.
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