<span>It can also be known as the enhanced entity model. This model, used in the creation of databases, allows for more precise creation of classes and groups. This allows the user to put together databases that are more specialized and group the objects together in more complex manners.</span>
1. Samples of a microbial colony obtained from the natural environment are not pure culture. They are mixed cultures because the environment consists of an array of microorganisms and not one specific organism. A sample obtained from the natural environment such as water or soil may contain several species of microbes that need to be further isolated to obtain a pure culture.
2. Isolation streak plate technique involves the dilution of the sample several folds and then streaking a small amount using a sterile inoculation loop on an agar plate in a zig-zag manner. This is done to obtain a pure culture of bacteria from a mixed population by separating the microprocessor. When the sample is diluted into a small concentration and is streaked onto agar placed, widely spaced, discrete colonies of bacteria can be observed. These isolated colonies can be further cultured to obtain pure cultures by picking and re-streaking them on fresh agar plates.
3. A microbial colony is considered a pure culture because it consists of single species. A single species of bacteria cluster and form an isolated colony on an agar plate which can be further plated on fresh medium.
3-1 - If your agar plate shows discrete uncluttered colonies then you have obtained an isolated colony. The following picture might help you to understand.
3-2. If you subculture isolated microbes into a sterile nutrient broth without any contamination, it will still be considered pure culture because it is single isolated species in a sterile aseptic environment of the nutrient broth.
3.3. A pure culture can become a mixed culture due to contamination. This could be caused by airborne bacteria if your conditions are not aseptic. Contamination is possible if the work area is not clean and sterile or if the glassware is not sterile. The contamination can transform your pure culture into a mixed culture and is hence problematic. So, it is very important to maintain a sterile and aseptic environment, glassware, and instruments.
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Answer:
Mormons are by far the most religious of the major religious groups in the U.S., with 74% classified as highly religious. Protestants, Muslims and Catholics are more of a mix of highly and moderately religious adults, while Jews and those who identify with another non-Christian religion are the least religious.
Explanation:
The most popular religion in the U.S. is Christianity, comprising the majority of the population (73.7% of adults in 2016). Christianity is the largest religion in Canada, with Roman Catholics having the most adherents. Christians, representing 67.3% of the population in 2011, are followed by people having no religion with 23.9% of the total population.
Answer:
Explanation:
1. Short reflexes are stimulated by stretching or chemical stimulation of the myenteric plexus, which can result in peristaltic contractions.
2. Long reflexes utilize the parasympathetic nervous system, specifically the Vagus nerve.
3. Hormonal secretions like gastrin and secretin are released into the blood and stimulate relatively distant parts of the digestive tract.
4. Paracrine secretions like histamine and prostaglandins diffuse through the tissue fluids and stimulate nearby target cells.
