Explanation:
Provided for the election of precident and vice president by the electoral college.
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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:
B) critical periods
Explanation:
Critical periods -
It is the stage during the lifespan of an organism , where the nervous system gets sensitive against some stimuli , is known as critical period .
In this very stage , the organism learn and adapt new skills and method , like vision , language etc .
Hence , the stage is very much important during the development process , Hence , from the question information , the correct term is critical periods .
Maintaining Economic Self Sufficiency
Answer:
equal employment opportunities
Explanation:
From the above Epic electronics is adopting an equal employment opportunities policy by making sure every employee that has the required skills and education receives the standard pay for his job. It also makes sure that all employees with same job or that have similar requirements(and therefore deserve similar pay) get similar pay and there are no discriminations whatsoever as is required in equal employment opportunities.
