what is the life-cycle of a bacteria?
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if you meant growth rate the the answer is that it is very variant and can be as short as 20 min or as long as 3 hr and more. as for the phases of the cycle- it just multiply it's DNA as fast as it can and splits into half.
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Microbiologists also classify bacteria according to whether or not they require oxygen to survive. Bacteria that require oxygen are called aerobic bacteria, or aerobes. Bacteria that live without oxygen are called anaerobic bacteria, or anaerobes. Both aerobes and anaerobes can be either phototrophic or nonphototrophic. Can live in the human body or in the enviroment
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The science and study of bacteria and their relation to medicine and to other areas such as agriculture (e.g., farm animals) and industry. Bacteria are single-celled microorganisms which can live as independent organisms or, dependently, as parasites. Among the better known bacteria are strep, staph, and the agents of tuberculosis and leprosy. \n\nBacteriology is a part of microbiology which encompasses the study of bacteria, viruses, and all other sorts of microorganisms
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There are a number of examples in which prokaryotic organisms coalesce into multicellular structures. One of those examples are in a group of bacteria called myxobacteria. In this case, myxobacteria form what's called fruiting bodies as part of their life cycle (see the link below for a picture of a fruiting body).
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here are lists and pictures\n\nhttp://www.buddycom.com/bacteria/gpc.html
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Because bacteria and viruses cause many diseases and people often confuse them. The way they reproduce is the primary functional difference.\n\nThey differ greatly in size. Viruses are normally much smaller. \n\nBacteria are complex compared to viruses. A typical bacterium has a rigid cell wall and a thin membrane surrounding cytoplasm inside the cell. A bacterium contains all of the genetic information needed to make copies of itself. Bacteria also have tools necessary for copying DNA so bacteria can reproduce. Some have threadlike structures called flagella that they use to move. \n\n All viruses have a protein coat and a core of genetic material, either DNA or RNA. And that's it.\n\nViruses have to invade other cells and take their cellular machinery to reproduce. Viruses invade by attaching to a cell and injecting their genes or by being swallowed up by the cell. \n   \nT viral genes tell the bacterium to begin making new virus parts. These parts come together to make whole new viruses inside the bacterium. \n\nEventually so many new viruses are made that the E. coli bursts open and dies, releasing all those new viruses to infect more cells!
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Asexual reproduction  as opposed to the sexual reproduction you and I know..  Usually happens in bacteria through a process known as binary fission.
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Nitrogen Cycle, natural cyclic process in the course of which atmospheric nitrogen enters the soil and becomes part of living organisms, before returning to the atmosphere. Nitrogen, an essential part of the amino acids, is a basic element of life. It also makes up 79 per cent of the Earth's atmosphere, but gaseous nitrogen must be converted to a chemically usable form before it can be used by living organisms. This is accomplished through the nitrogen cycle, in which gaseous nitrogen is converted to ammonia or nitrates (salts of nitric acid). The high energies provided by lightning and cosmic radiation serve to combine atmospheric nitrogen and oxygen into nitrates, which are carried to the Earth's surface in precipitation. Nitrogen fixation, the biological process which accounts for the bulk of the nitrogen-conversion process, is accomplished by free-living, nitrogen-fixing bacteria; symbiotic bacteria living on the roots of plants (mostly legumes and alders); cyanobacteria; certain lichens; and epiphytes in tropical forests.\n\nNitrogen “fixed” as ammonia and nitrates is taken up directly by plants and incorporated in their tissues as plant proteins. The nitrogen then passes through the food chain from plants to herbivores to carnivores in the process known as the food web. When plants and animals die, the nitrogenous compounds are broken down by decomposing into ammonia, a process called ammonification. Some of this ammonia is taken up by plants; the rest is dissolved in water or held in the soil, where micro-organisms convert it into nitrates and nitrites in a process called nitrification. Nitrates may be stored in decomposing humus or leached from the soil and carried to streams and lakes. They may also be converted to free nitrogen through denitrification and returned to the atmosphere.\n\nIn natural systems, nitrogen lost by denitrification, leaching, erosion, and similar processes is replaced by fixation and other nitrogen sources. Human intrusion in the nitrogen cycle, however, can result in less nitrogen being cycled, or in an overload of the system. For example, the cultivation of croplands, harvesting of crops, and cutting of forests have all caused a steady decline of nitrogen in the soil. (Some of the losses on agricultural lands are replaced only by applying energy-expensive nitrogenous fertilizers manufactured by artificial fixation.) On the other hand, the leaching of nitrogen from overfertilized croplands, cutover forestland, and animal wastes and sewage has contributed to water pollution by adding too much nitrogen to aquatic ecosystems, resulting in reduced water quality and the stimulation of excessive algal growth. In addition, nitrogen dioxide poured into the atmosphere from vehicle exhausts and power plants breaks down to form ozone and reacts with other atmospheric pollutants to form photochemical smog.\n\n\nCarbon Cycle (ecology), in ecology, the cycle of carbon usage by which energy flows through the Earth's ecosystem. The basic cycle begins when photosynthesizing plants use carbon dioxide (CO2) found in the atmosphere or dissolved in water. Some of this carbon is incorporated in plant tissue as carbohydrates, fats, and protein; the rest is returned to the atmosphere or water by respiration. Carbon is thus passed on to herbivores that eat the plants and thereby use, rearrange, and degrade the carbon compounds. Much of it is given off as CO2 in respiration, as a by-product of metabolism, but some is stored in animal tissue and is passed on to carnivores feeding on the herbivores. Ultimately, all the carbon compounds are broken down by decomposition, and the carbon is released as CO2 to be used again by plants.\nOn a global scale the carbon cycle involves an exchange of CO2 between two great reservoirs: the atmosphere and the Earth's waters. Atmospheric CO2 enters water by diffusion across the air-water surface. If the CO2 concentration in the water is less than that in the atmosphe
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Bacteria are procaryotes. Their cell structure is different from those of plants and animals (Eucaryotes) they are in their own category altogether. Years and years ago they were categorized as plants. Some of them have clorophyll. How old is your brother's science book?
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Gram positive bacteria possess a thick cell wall containing many layers of peptidoglycan and teichoic acids. In contrast, Gram negative bacteria have a relatively thin cell wall consisting of a a few layers of peptidoglycan surrounded by an outer lipid membrane containing lipopolysaccharides and lipoproteins. Most bacteria have the Gram negative cell wall; only organisms from the Phyla Firmicutes and Actinobacteria (previously know as the or low G+C and high G+C Gram positive bacteria, respectively).
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Initial decay is from cell lysis and release of enzymes from lysosomes. The body essentially starts eating itself. This doesn't last long though and then bacterial processes commence. That's why refrigeration slows down decay, the bacteria are 'cold blooded' so to speak.
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It divides by mitosis then it begin to grow.According to which type of cell your referring to.That's what I think.
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No, plantkon are just very small plants and animals. They are not single celled organisms, but if they were, that wouldnt automatically make them bacteria. Bacteria can only be prokaryotic organisms.\n\nBacteria are constantly being eaten. There is bacteria on everything you eat, and very often, bacteria is used in the production of food.
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Bacteria are self-supporting life forms.  They live.  Viruses are non-living hijackers that have to hijack other cells to live.  They are just DNA bits or possibly RNA, and by themselves they don't do anything.  But they get into cells and re-program the cells to make more viruses, instead of doing whatever that cell was doing before.
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Life processes are\nmovement\nsensitivity to movement and light etc\ngrowth\nexcretion and digestion\nreproduction\n\nViruses fullfill most life processes - the one they don't fullfill is reproduction since they can only replicate themselves in a host cell. There are also problems saying that they "grow"\n\nThere is a lot of debate on this topic but my vote is no.
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I've never heard of any attempt of last-gasp reproduction in the animal domain. I have however heard of something similar in the bacterial domain of life. Bacteria of the genus Bacillus will sporulate under the appropriate environmental cues. These cues are usually things like low amounts of water, food, extreme shifts in temerature, etc. All these cues are ones that would probably end up in the death of the organism. The spores that are created are resistant to these harsh conditions and allow the bacteria to survive for long periods of time and can germinate if conditions return to a friendlier state.
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well, there are many factors that led to the growth of bacteria..first, the temperature. Temperature affects the growth of bacteria. Like for instance, there are several bacteria that thrive in room temperature, and there are those that thrive in very cold or very hot temperatures. Second, the pH affects the growth of bacteria also. For example, there are micro organisms that thrive in very acidic env't (ex. Candida albicans which causes Candidiasis), also there are those that thrive in alkaline env't.Third, there are special micro organisms that thrive in extreme environment. For instance, there are those that thrive in very saline env't, called extreme halophiles. There are also that thrive in methane- rich env't.\nThere are other factors that lead to the growth of micro organisms but one thing is for sure...micro organisms are everywhere even in the place where no other living things can thrive...