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.
Often made a new microscope for each specimen. Examined water and visualized tiny animals, fungi, algae, and single-celled protozoa, animalcules. Define microbes in the words of Leeuwenhoek. Beasties, or animalcules, no larger that 1/100 of the size of a grain of sand. List 6 groups of microorganisms. Fungi, protozoa, algae, bacteria, archaea, small animals. Explain why protozoa, algae and non-microbial parasitic worms are studied in microbiology.