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.
1 Bacteria-Bacteria are small microorganisms. 2  They can cause diseases such as tuberculosis, cholera, typhoid fever, and tetanus. 3  Parasites-Parasites are organisms that live off their hosts. 4  Some parasitic diseases include malaria, sleeping sickness, and scabies.5  Fungi-Fungi are microorganisms such as yeasts and molds. Bacteria-Bacteria are small microorganisms. 2  They can cause diseases such as tuberculosis, cholera, typhoid fever, and tetanus. 3  Parasites-Parasites are organisms that live off their hosts. 4  Some parasitic diseases include malaria, sleeping sickness, and scabies. 5  Fungi-Fungi are microorganisms such as yeasts and molds.