A microorganism, or microbe, [a] is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells. The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India.

2017年4月29日 · A microorganism is a living thing that is too small to be seen with the naked eye. Examples of microorganisms include bacteria, archaea, algae, protozoa, and microscopic animals such as the dust mite.

microbiology, study of microorganisms, or microbes, a diverse group of generally minute simple life-forms that include bacteria, archaea, algae, fungi, protozoa, and viruses. The field is concerned with the structure, function, and classification of such organisms and with ways of both exploiting and controlling their activities.

The meaning of MICROORGANISM is an organism (such as a bacterium or protozoan) of microscopic or ultramicroscopic size.

2021年7月28日 · An organism that is microscopic or submicroscopic, which means it is too small to be seen by the unaided human eye. Microorganisms were first observed by Anton van Leeuwenhoek in 1675 using a microscope of his own design. Examples of microorganisms include bacteria, fungi, archaea, and protist s.

2022年4月5日 · Microbes are tiny living things that are found all around us. Also known as microorganisms, they are too small to be seen by the naked eye. They live in water, soil, and in the air. The human body is home to millions of these microbes too. Some microbes make us ill, others are important for our health.

2024年3月28日 · A microorganism, or microbe, is a tiny living organism that is invisible to the naked eye and can exist as single-celled entities or colonies of cells.

Learn more about the structure of microbes, the different phases of growth, how they reproduce, and what byproducts they create. Harvard experts are exploring how we can work with, defend against, and harness the capabilities of the estimated five nonillion microbes living on Earth today.

2024年4月21日 · Microorganisms differ from each other not only in size, but also in structure, habitat, metabolism, and many other characteristics. While we typically think of microorganisms as being unicellular, there are also many multicellular organisms that are too small to be seen without a microscope.

2018年3月13日 · Microorganisms may be composed of prokaryotic or eukaryotic cells, and they may be single-celled or multicellular. Examples of microorganisms include algae, fungi, protozoa, bacteria and viruses.