are microbes cells? can they multiply/reproduce? how?

Answer 1

Yes, microbes are cells. They are single-celled organisms; they reproduce by a process called mitosis, also known as cell division.

Answer 2

A microbe or microorganism is an organism that is microscopic (too small to be visible to the human eye). The study of microorganisms is called microbiology. Microbes can be bacteria, fungi, archaea or protists, but not viruses and prions because they are generally classified as non-living. Microbes are often described as single-celled, or unicellular organisms; however, some unicellular protists are visible to the human eye, and some multicellular species are microscopic.

Microbes live almost everywhere on earth where there is liquid water, including hot springs on the ocean floor and deep inside rocks within the earth's crust. Microbes are critical to nutrient recycling in ecosystems as they act as decomposers. As some microorganisms can also fix nitrogen, they are an important part of the nitrogen cycle. However, pathogenic microbes can invade other organisms and therefore cause disease.

Answer 3

Yes, All organisms including microbes are composed of cells. The microbes are unicellular organisms----only visible under microscope. They include all types of bacteria, mycoplasma, some fungi and good number of protists including protozoa like amoeba etc. The predominant mode of reproduction or multiplication is simple type of divisions like binary fission, mitosis etc.

Answer 4

microbes are single prokariotic celled organisms that asexually reproduce by a process called mitosis about every 20 minuets on average (this process happens in us as well)

Answer 5

A microorganism or microbe is an organism that is microscopic The study of microorganisms is called microbiology. Microorganisms can be bacteria, fungi, archaea or protists, but not viruses and prions because they are generally classified as non-living. Micro-organisms are often described as single-celled, or unicellular organisms; however, some unicellular protists are visible to the human eye, and some multicellular species are microscopic.Microorganisms live almost everywhere on earth where there is liquid water, including hot springs on the ocean floor and deep inside rocks within the earth's crust. Microorganisms are critical to nutrient recycling in ecosystems as they act as decomposers. As some microorganisms can also fix nitrogen, they are an important part of the nitrogen cycle. However, pathogenic microbes can invade other organisms and therefore cause disease.Single-celled microorganisms were the first forms of life to develop on earth, approximately 4 billion years ago and for about 3 billion years, all organisms were microscopic. Therefore, for the majority of the history of life on earth the only form of life were microorganisms. The identification of bacteria, algae and fungi in amber that is 220 million years old, shows that the morphology of microorganisms have not changed significantly since the triassic period.Most microorganisms reproduce rapidly and in great number. Microbes such as bacteria can also freely exchange genes by conjugation, transformation and transduction between widely-divergent species. This horizontal gene transfer, coupled with a high mutation rate and many other means of genetic variation, allows microorganisms to swiftly evolve to survive in new environments and respond to environmental stresses. This rapid evolution has led to the recent development of 'super-bugs'. Anton van Leeuwenhoek, the first person to observe microorganisms using a microscopePrior to Anton van Leeuwenhoek's discovery of microorganisms in 1676, it had been a mystery as to why grapes could be turned into wine, milk into cheese, or why food would spoil. Leeuwenhoek did not make the connection between these processes and microorganisms, but he did establish that there were forms of life that were not visible to the naked eye. Leeuwenhoek's discovery, along with subsequent observations by Lazzaro Spallanzani and Louis Pasteur, ended the long-held belief that life spontaneously appeared from non-living substances during the process of spoilage.Lazzarro Spallanzani found that microorganisms could only settle in a broth if the broth was exposed to the air. He also found that boiling the broth would sterilise it and kill the microorganisms.Louis Pasteur expanded upon Spallanzani's findings by exposing boiled broths to the air, in vessels that contained a filter to prevent all particles from passing through to the growth medium, and also in vessels with no filter at all, with air being admitted via a curved tube that would not allow dust particles to come in contact with the broth. By boiling the broth beforehand, Pasteur ensured that no microorganisms survived within the broths at the beginning of his experiment. Nothing grew in the broths in the course of Pasteur's experiment. This meant that the living organisms that grew in such broths came from outside, as spores on dust, rather than spontaneously generated within the broth. Microorganisms can be found almost anywhere in the taxonomic organization of life on the planet. Bacteria and archaea are almost always microscopic, whilst a number of eukaryotes are also microscopic, including most protists and a number of fungi. Viruses are generally regarded as not living and therefore are not microbes, although the field of microbiology also encompasses the study of viruses.
.Bacteria are practically all invisible to the naked eye, with few extremely rare exceptions, such as Thiomargarita namibiensis.They are unicellular organisms and lack organelles. Their genome is usually a single string of DNA, although they can also harbor small pieces of DNA called plasmids. They reproduce by binary fission.Microorganisms are found in almost every habitat present in nature. Even in hostile environments such as the poles, deserts, geysers, rocks, and the deep sea, some types of microorganisms have adapted to the extreme conditions and sustained colonies; these organisms are known as extremophiles.Certain microbes have adapted so that they can survive and even thrive in conditions that are normally fatal to most lifeforms. Microorganisms have been found around underwater black smokers and in geothermal hot springs, as well as in extremely salty bodies of water.The nitrogen cycle in soils depends on the fixation of atmospheric nitrogen.

Answer 6

they multiply asexually by
binary fission
budding or sexually by lateral fertilization