How are bacteria formed? ahh i know its a useless question but im hellbent to find out how?

http://www.earthlife.net/prokaryotes/bac...


There you go good sir.

How are bacteria formed? ahh i know its a useless question but im hellbent to find out how?
JUst by the air and people, and dead skin cells and all that awsome stuff..
Reply:it by itself they formed in dirty conditions
Reply:Hey! I wish i could help you, but i can tell you to check the internet for answers,try goggle search. Good Luck.
Reply:Bacteria (singular: bacterium) are a major group of living organisms. The term "bacteria" has variously applied to all prokaryotes or to a major group of them, otherwise called the eubacteria, depending on ideas about their relationships. Here, bacteria is used specifically to refer to the eubacteria. Another major group of bacteria (used in the broadest, non-taxonomic sense) are the Archaea. The study of bacteria is known as bacteriology, a subfield of microbiology.





Bacteria are the most abundant of all organisms. They are ubiquitous in soil, water, and as symbionts of other organisms. Many pathogens are bacteria. Most are minute, usually only 0.5-5.0 ºm in their longest dimension, although giant bacteria like Thiomargarita namibiensis and Epulopiscium fishelsoni may grow past 0.5 mm in size. They generally have cell walls, like plant and fungal cells, but bacterial cell walls are normally made out of peptidoglycan instead of cellulose (as in plants) or chitin (as in fungi), and are not homologous with eukaryotic cell walls. Many move around using flagella, which are different in structure from the flagella of other groups.





The first bacteria were observed by Anton van Leeuwenhoek in 1674 using a single-lens microscope of his own design. The name bacterium was introduced much later, by Ehrenberg in 1828, derived from the Greek word meaning "small stick". Because of the difficulty in describing individual bacteria and the importance of their discovery to fields such as medicine, biochemistry, and geochemistry, the history of bacteriology is generally described as the history of microbiology.





As prokaryotes (organisms without the cell nucleus)all bacteria have a relatively simple cell structure lacking a cell nucleus and organelles such as mitochondria and chloroplasts. Most bacteria are relatively small and possess distinctive cell and colony morphologies (shapes) as described below. The most important bacterial structural characteristic is the cell wall. Bacteria can be divided into two groups (Gram positive and Gram negative) based on differences in cell wall structure as revealed by Gram staining. Gram positive bacteria possess a cell wall containing a thick peptidoglycan (called Murein in older sources) layer and teichoic acids while Gram negative bacteria have an outer, lipopolysaccharide-containing membrane and a thin peptidoglycan layer located in the periplasm (the region between the outer and cytoplasmic membranes).





Many bacteria contain other extracellular structures such as flagella and fimbriae which are used for motility (movement), attachment, and conjugation respectively. Some bacteria also contain capsules or slime layers that also facilitate bacterial attachment to surfaces and biofilm formation. Bacteria contain relatively few intracellular structures compared to eukaryotes but do contain a tightly supercoiled chromosome, ribosomes, and several other species-specific structures such as intracellular membranes, nutrient storage structures, gas vesicles, and magnetosomes. Some bacteria are capable of forming endospores which allows them to survive extreme environmental and chemical stresses. This property is restricted to specific Gram positive organisms such as Bacillus and Clostridium.





In contrast to higher organisms, bacteria exhibit an extremely wide variety of metabolic types. In fact, it is widely accepted that eukaryotic metabolism is largely a derivative of bacterial metabolism with mitochondria having descended from a lineage within the -Proteobacteria and chloroplasts from the Cyanobacteria by ancient endosymbiotic events. Bacterial metabolism can be divided broadly on the basis of the kind of energy used for growth, electron donors and electron acceptors and by the source of carbon used. Most bacteria are heterotrophic; using organic carbon compounds as both carbon and energy sources.





In aerobic organisms, oxygen is used as the terminal electron acceptor. In anaerobic organisms other inorganic compounds, such as nitrate, sulfate or carbon dioxide as terminal electron acceptors leading to the environmentally important processes of denitrification, sulfate reduction and acetogenesis, respectively. Non-respiratory anaerobes use fermentation to generate energy and reducing power, secreting metabolic by-products (such as ethanol in brewing) as waste.





Facultative anaerobes can switch between fermentation and different terminal electron acceptors depending on the environmental conditions in which they find themselves. As an alternative to heterotrophy many bacteria are autotrophic, fixing carbon dioxide into cell mass. Energy metabolism of bacteria is either based on phototrophy or chemotrophy, i. e. the use of either light or exergonic chemical reactions for fueling life processes. Lithotrophic bacteria use inorganic electron donors for respiration (chemolithotrophs) or biosynthesis and carbon dioxide fixation (photolithotrophs), opposed by organotrophs which need organic compounds as electron donors for biosynthetic reactions (and mostly as well as carbon sources).





Common inorganic electron donors are hydrogen, carbon monoxide, ammonia (leading to nitrification), ferrous iron, other reduced metal ions or even elemental iron and several reduced sulfur compounds. Additionally, methane metabolism, although formally counted as organotrophic, is actually more related to lithotrophic metabolic pathways. In both aerobic phototrophy and chemolithotrophy oxygen is used as a terminal electron acceptor, while under anaerobic conditions inorganic compounds (see above) are used instead. Most photolithotrophic and chemolithotrophic organisms are autotrophic, meaning that they obtain cellular carbon by fixation of carbon dioxide, whereas photoorganotrophic and chemoorganotrophic organisms are heterotrophic. In addition to carbon, some organisms also fix nitrogen gas (nitrogen fixation).





This environmentally important trait can be found in bacteria of nearly all the metabolic types listed above but is not universal. The distribution of metabolic traits within a group of organisms has traditionally been used to define their taxonomy, although these traits often do not correspond with genetic techniques.





All bacteria reproduce through asexual reproduction (binary fission) which results in cell division. Two identical clone daughter cells are produced. Some bacteria, while still reproducing asexually, form more complex reproductive structures that facilitate the dispersal of the newly-formed daughter cells. Examples include fruiting body formation by Myxococcus and arial hyphae formation by Streptomyces.





In the laboratory, bacteria are usually grown using two methods, solid and liquid. Solid growth media such as agar plates are used to isolate pure cultures of a bacterial strain. When quantitation of growth or large volumes of cells are required liquid growth media are generally used. Growth in liquid media, with stirring, most often occurs as an even cell suspension making the cultures easier to divide and transfer compared to solid media, although the isolation of individual cells from liquid media is extremely difficult. In both liquid and solid media there exist a finite amount of nutrients, which allows for the study of the bacterial cell cycle.





These limitations can be avoided by the use of a chemostat, which maintains a bacterial culture under steady-state conditions by the continuous addition of nutrients and the removal of waste products and cells. Large chemostats are often used for industrial-scale microbial processes.Most techniques commonly used to grow bacteria are designed to optimise the amount of cells produced, the amount of time needed to produce them, and the cost to produce them. In a bacterium's natural environment nutrients are limited, meaning that bacteria cannot continue to reproduce indefinitely. This constant limitation of nutrients has led the evolution of many different growth strategies in different types of organisms.





Some possess the ability to grow extremely rapidly when nutrients become available, such as the formation of algal (and cyanobacterial) blooms that often occur in lakes during the summer. Other organisms have devised more specialized strategies to make them more successful in a harsh environment, such as the production of antibiotics by Streptomyces; often at the expense of a slower growth rate. In a natural environment, many organisms live in communities (e.g. biofilms) which may allow for increased supply of nutrients and protection of environmental stresses. Often these relationships are essential for growth of a particular organism or group of organisms (syntrophy).





These evolutionary tactics to overcome nutrient limitation must be accounted for in an industrial/laboratory bacterial growth experiment. For instance bacteria that tend to agglutinate may need more vigorous stirring to break apart any large bacterial masses. The main growth attribute that must be understood for controlled growth is that bacteria have defined growth phases.A controlled bacterial growth will follow three distinct phases. Nearly all cultures start from taking a relatively old stock of bacteria and diluting them in to fresh media; these cells need to adapt to the nutrient rich environment.





The first phase of growth is the lag phase, a period of slow growth most often attributed to the need for cells to adapt to fast growth. The lag phase has high biosynthesis rates; enzymes needed to metabolise a variety of substrates are produced. The second phase of growth is the logarithmic phase (log phase), also known as the exponential phase. The log phase is marked by rapid exponential growth. The rate at which cells grow during this phase is known as the growth rate (k). The time it takes the cells to double during the log phase is known as the generation time (g).





During the log phase, nutrients are metabolised at maximum speed until they are all gone. The final phase of growth is the stationary phase. This phase of growth is caused by depleted nutrients. The cells begin to shut down their metabolic activity, as well as break-down their own non-essential proteins. The stationary phase is a transition from rapid growth to dormancy. The cells turn off all non-essential functions, such as bacterial conjugation.





Motile bacteria can move about, using flagella, bacterial gliding, or changes of buoyancy. A unique group of bacteria, the spirochaetes, have structures similar to flagella, called axial filaments, between two membranes in the periplasmic space. They have a distinctive helical body that twists about as it moves.





Bacterial flagella are arranged in many different ways. Bacteria can have a single polar flagellum at one end of a cell, clusters of many flagella at one end or flagella scattered all over the cell, as with peritrichous. Many bacteria (such as E.coli) have two distinct modes of movement: forward movement (swimming) and tumbling. The tumbling allows them to reorient and introduces an important element of randomness in their forward movement.





Motile bacteria are attracted or repelled by certain stimuli, behaviors called taxes - for instance, chemotaxis, phototaxis, mechanotaxis, and magnetotaxis. In one peculiar group, the myxobacteria, individual bacteria attract to form swarms and may differentiate to form fruiting bodies. The myxobacteria move only when on solid surfaces, unlike E. coli which is motile in liquid or solid media.





hope it answers your question!!!
Reply:well...when two bacterias love each other....the daddy bacteria lies down with the mommy bacteria.....aaa hell, I don't know, probably has to do with amino acids forming together at the cellular level to become protozoa.
Reply:There's no magic or spontaneous genesis. Bacteria exists. Environmental conditions either allow it to thrive or cause it to dwindle. For instance, staphylococcus exists on a medical instrument. It can't thrive because there's no food, but it is contaminated. You get treated using the instrument. Your body provides an environment that allows the bacteria to thrive. It goes through a period of rapid division brought on be the favorable conditions and abundant food supply, namely you. You get treated with antibiotics and the staph is cleared from you system, but you seeped puss onto a band-aid that got picked up by your sister who had an open wound on her finger. Staph can't thrive on the band-aid, but your sister's finger is a good place to find a meal. Cycle starts over again.
Reply:as we all know bacteria were the most primitive lifeforms on earth. they have existed before we have and they will continue to exist without us. they were formed through the interaction of amino acids which are the basic or fundamental building blocks of life and electrical current to kick start the formation of protein which most lifeforms are made up of. hope this helps.
Reply:It's not necessarily that they are formed. They grow. Bacteria is found everywhere- on everything from your skin to your food. Most bacteria is part of our normal flora. On the body, bacteria can act as a protective agent- keeping out potentially harmful bacteria. Think about it this way. I see that you're a 30 Seconds to Mars fan. Think about going to a show. You're the biggest fan and one of the first people to show up to this concert. (Hypothetically, you are going to be the normal flora. The good bacteria- the fan). Now you and all of the other big fans are right there. Front row right along the stage. Keeping out the obnoxious jerks that could possibly taint this show. You are acting as a barrier against those other people.





Now onto how bacteria grow. (Note that this is a very VERY short version of what I've learned in my microbiology class.And it probably doesn't even begin to cover all of it. :))


There are many MANY different types of bacteria. Just like other living things (bc yes all bacteria are living organisms), each type requires something different in order to grow; temperature, light, food source, water... you get the picture. Provided an ideal environment, bacteria will multiply.





Check this site out. This may explain the doubling or multiplying a little better. Hope this helps! :)





http://en.wikipedia.org/wiki/Bacterial_g...
Reply:if u want to incubate bacteria in a lab you'd have sth called "medium" where bacteria can grow cz it contains nutreints, there're two main types media: general purpose media which most bacteria types can grow in. if u mean bacteria in nature, it grows as long as it finds its nutreints so that it can reproduce. u can find it any where (mouth,intestine,air,water...........ett...
Reply:Bacteria do not form out of nothing, or out of dirt, on a daily basis. That concept is called spontaneous generation, and informed society has not believed in that for centuries. Abiogenesis is the concept that the formation of organic matter from inorganic matter happened once, and took a huge number of years to do so.





Bacteria are alive. They multiple to increase their numbers, like humans, or cats, or lobsters. They also require the proper amount of nutrients, and to stay away from things that are toxic to them. But unlike animals, they do not mate, but reproduce asexually. They divide (see link below).





Bacteria are omnipresent, every surface you can see has them. Most are harmless, or even beneficial to us. Sometimes, one of these bacteria get into a place that they aren't suppose to be, and they begin to grow, and cause an infection. It's not the stepping on a rusty nail that causes tetanus, is the bacteria Clostridium tetani that is likely living on that nail.