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What else can I help you with?
Why humans are considered to be a very successful species?
They are not, bacteria is the most important species - without them humans would not last more than a few hours.
What bacterial cell contains no nucleus?
There are very few species of bacteria that have no cell wall. In most cases, bacteria will have a cell wall that is made from peptidoglycan.
What domain is bacteria?
Domain Bacteria is composed of organisms that are much more common than Archaea and live almost anywhere. There are more bacteria in a person's mouth than there are people in the world. Many are decomposers, some are photosynthesizers, and a few cause disease. Most bacteria cause disease by producing exotoxins that harm human cells, while others cause illness as a result of glycoproteins found on the outside of their capsules. There are many shapes that bacteria can come in, but three of the main ones are cocci, bacilli, and spirochete. Cocci are spherical prokaryotic cells that are usually found in clusters or colonies. Some cocci form chains; bacteria of this type are called streptococci. Bacilli are rod shaped cells that are usually found individually, although a few form pairs, diplobacilli, or chains, streptobacilli. Spirochetes are the last group. The bacteria in this group are helically shaped and usually are found alone. They can reach .5 mm long but are extremely thin.
Why does some species of bacteria undergo major changes in just a few years?
Some species of bacteria have a fast reproduction rate, allowing them to accumulate mutations rapidly. This can lead to major changes in just a few years as advantageous mutations are selected for and become dominant in the population. Additionally, bacteria can exchange genetic material through processes like horizontal gene transfer, further contributing to rapid changes in their genome.
Why don't all bacteria die during the cooking process?
Different species of bacteria have different sensitivity to high temperatures. Fortunately practically all species of bacteria that can cause food poisoning are killed by temperatures less than 160F and most of the rest can be killed by the high pressure canning temperatures around 240F to 250F. A few species of bacteria can actually survive and grow in the high pressure, high temperature (up to 600F), high radioactivity environment inside pressurized water nuclear reactors! Most of these species of bacteria feed on metal ions not organic material and can be a serious cause of corrosion and maintenance problems in such reactors.
How long can bacteria live on glass?
depend upon type of bacteria as some bacterial species can form spores and live for many years in that latent condition if the glass is not autoclaved, but others can die withing an hour or two if no nutrition is provided to them.
What pH water activity levels do bacteria grow?
pH levels vary among bacterial species. For example; acidophillic bacteria grow best at low pH. While alkalophiles grow better at alkaline (high) pH. Most bacteria grow best at high aw (>0.90). While few bacterial species such as xerophiles grow best at an aw of 0.6-0.7
What is nature's way of changing nitrogen atoms to usable matter?
Nitrogen fixation as performed by a very few species of anaerobic soil bacteria. The most prolific species of these bacteria are symbiotic with legume plants. In the early 1900s Haber in Germany invented an industrial process to perform nitrogen fixation without the need for such microorganisms.
What pH and water activity (aw) levels do bacteria grow best?
pH levels vary among bacterial species. For example; acidophillic bacteria grow best at low pH. While alkalophiles grow better at alkaline (high) pH. Most bacteria grow best at high aw (>0.90). While few bacterial species such as xerophiles grow best at an aw of 0.6-0.7
What is the temperature grow in bacteria?
There are a few different temperatures that allow you to grow bacteria. Warm temperatures tend to grow bacteria rather well.
What is a narrow spectrum antibiotic effective against?
Narrow spectrum antibiotics are effective against just gram positive bacteria, just gram negative bacteria, or only a few specified species. Examples include: penicillin G, gentamicin, clindamycin, and gentamicin.
Do bacteria reproduce through spores?
Endosposres are intracellular resting cells. With a few exceptions endospore formation is restricted to some large gram positive bacilli. Among cocci and spirila endospores are formed only in few species e.g. Sarcina lutea, S. ureae, Dusulfovibrio desulfuricans. Gramd negative do not form spores or endospores.
