A microorganism, or microbe, is a microscopic organism, which may exist in its single-celled form or in a colony of cells. Microbiology, the scientific study of microorganisms, began with their observation under the microscope in the 1670s by Antonie van Leeuwenhoek.
There are different types of microbes:
A virus is definitely too small to be seen without a microscope. Since viruses are so small (tinier than bacteria) they may be considered microbes. However, since they are not "alive" outside of a host organism, it is debatable whether they are really organisms at all.
Microorganisms, also called microbes, are extremely tiny organisms that can only be seen under a microscope. Microorganisms are one of the most diverse organisms and they include bacteria, fungi, archaea, protists, green algae, plankton and amoeba. Some scientists also classify viruses as microorganisms.
There are five major groups:
Yeasts are simple, single celled fungi which are widely found in the environment. They can break down sugars into ethanol (alcohol) and carbon dioxide. This ability is harnessed to make bread, beer, wine and many other alcoholic drinks. Yeast contributes to the texture and taste of bread.
Useful microbes. Yeast cells are useful to bakers and brewers. Yeast cells can change sugar into carbon dioxide gas and alcohol. This is useful to bakers because the gas helps the bread rise, and it is useful to brewers because it adds the alcohol needed for their drinks.
They are the same, microbe is an abbreviation of microorganism. These terms are often used interchangeably among microbiologist. Microorganism is an organism too small for human visual detection, such as bacteria, fungi, protozoa, and some worms.
Microorganisms — bacteria, archaea, fungi, algae, viruses and protists — are often easy to overlook. For the most part (except fungal fruiting bodies seen as mushrooms) we can't see microbes. Most people know that bacteria and viruses can act as “germs” and cause disease.
There are 5 basic groups of microorganisms:
- a. Bacteria.
- b. Fungi: yeasts and molds.
- c. Viruses.
- d. Protozoa.
- e. Algae.
Microbes live in the soil, on rocks, inside roots, buried under miles of Earth, in compost piles and toxic waste, and all over the Earth's surface. Microbes are found in boiling hot springs and on frozen snowfields. Microbes live in homes, in schools and on statues.
A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.
The four major types of germs are: bacteria, viruses, fungi, and protozoa. They can invade plants, animals, and people, and sometimes they make us sick. Bacteria (say: BAK-teer-ee-uh) are tiny, one-celled creatures that get nutrients from their environments in order to live.
Fossils of 3.5-billion-year-old microbial communities were discovered in Australia. Scientists have found fossil evidence of ancient microbial communities that lived 3.5 billion years ago.
If microorganisms help in performing different body functions then they also take something from the body that is they take nutrients from the body. One purpose of bacteria in the body is to fight against those harmful bacteria which can cause diseases.
Yeast are single-celled microorganisms that are classified, along with molds and mushrooms, as members of the Kingdom Fungi. Yeasts are evolutionally diverse and are therefore classified into two separate phyla, Ascomycota or sac fungi and Basidiomycota or higher fungi, that together form the subkingdom Dikarya.
Micro-organisms (or microbes for short) play a very important role in our lives. These microscopic organisms play a key role in maintaining life on earth, fixing gases and breaking down dead plant and animal matter into simpler substances that are used at the beginning of the food chain.
agar plate [agar plate: A petri dish that contains agar gel and usually some nutrients. Agar plates are used to culture (grow) bacteria and fungi in the lab.] petri dish [petri dish: A shallow glass or plastic dish that is commonly used in the lab to culture (grow) microbes, usually on agar gel.]
Bacteria break down (or decompose) dead organisms, animal waste, and plant litter to obtain nutrients. But microbes don't just eat nature's waste, they recycle it. The process of decomposition releases chemicals (such as carbon, nitrogen, and phosphorus) that can be used to build new plants and animals.