For information on a specific unit, click on the first letter of its name: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z. Answers to the three most frequently asked questions:
Microorganisms were the first living creatures on earth. It is estimated there are a total of 5 nonillion microorganisms on earth (5x1020). You will find nearly 10 million a millilitre of ocean water and 40 million in a gram of soil. They are also ubiquitous on the human body.
Microorganisms are very tiny living things. They are so small that you need a microscope to see them. Microorganisms are all around us, in the air, in our bodies and in water. Some microorganisms are harmful to us, but others are helpful to us. There are three types of microorganism: viruses. bacteria. fungi. 1  Page: 2  1.3  2.icroorganisms are all around us, in the air, in our bodies and in water. Some microorganisms are harmful to us, but others are helpful to us. There are three types of microorganism: viruses. bacteria. fungi. 1  Page: 2  1.