Question

What comes into your mind when you hear the word bacteria

Answer 1

Answer:

The organisms which can only be seen under the microscope.

Explanation:

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Answer 2

Answer:

When we hear the word bacteria "the most abundant microorganism that are found almost everywhere on the earth" comes and my mind.

• the size of bacteria varies from 0.2 to 100 microns (1 micron = one-thousandth of a millimeter).
• On the basis of shape they can be cocci, bacilli, spirilla, vibrio.
• They can be both aerobic and anaerobic bacteria: the bacteria which need oxygen for their growth are called aerobic bacteria whereas the bacteria which survive without oxygen is called anaerobic bacteria.