Micro-organisms first appeared on earth about 3.5 billion years ago.They were very important in sustaining life on our planet. Microbes generate at least half the oxygen we breathe.; Microbes thrive in extremes of heat, cold, radiation, pressure, acidity and darkness, and often where no other life forms could exist and where nutrients come only from inorganic matter.
Proper Hand Washing Essays. 662 Words 3 Pages. Show More. Hand Washing Cristina Mesa Nova Southeastern University Hand Washing Proper hand washing is the first line in defense against spreading bacteria and infections. Most individuals don’t understand the importance of simply washing their hands.. Essay Types Of Bacteria And Diseases.
A microorganism, or microbe, is a microscopic organism, which may exist in its single-celled form or in a colony of cells. The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from 6th century BC India and the 1st century BC book On Agriculture by Marcus Terentius Varro.The scientific study of microorganisms began with their observation.
Harmful microorganisms not only damage the human body but also the food we eat. Sometimes, they multiply on food and release toxic products hence cause food poisoning. To avoid food poisoning, food preservation is done in various ways like pasteurization, salting, boiling etc. In conclusion, microorganisms are all around us.
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.
Bacteria are microscopic living organisms, usually one-celled, that can be found everywhere. They can be dangerous, such as when they cause infection, or beneficial, as in the process of fermentation (such as in wine) and that of decomposition. PLAY; LOOK UP. LISTS; Vocabulary.com Dictionary; Advanced Search.
Grade 6 Standard 5 Unit Test Microorganisms 1. Which of the following correctly describes the size of fungi compared to the size of bac-teria? A. Fungi are larger. B. Bacteria are larger. C. They are about the same size. D. They are the same size but different shapes. Use this drawing of a paramecium to answer the next two questions: 2.