Polymorphism allows a function or operator to perform different tasks depending on the types of the arguments or operands. Polymorphism is the use of a single symbol to represent many different kinds, or the provision of a single interface to entities of different types, in programming language theory and type theory.
The idea is to operator derived from a biological theory that states that an organism or species can go through a variety of shapes or stages. The 1960s saw a substantial increase in interest in polymorphic type systems, and by the end of the decade, actual implementations were starting to surface.
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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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In the field at Yorktown, Virhinia
Carrie Chapman Catt was a President of the National American Women's Suffrage Association.
Carrie Chapman Catt's Winning Plan had the following strategies:
Have senators and representatives of different states support Women's Suffrage (women's right to vote).
Obtain suffrage at both the federal and state levels with a compromise for partial suffrage in resisting states.
Support the war effort to give off patriotic airs to the public.
Answer:
Option E, Both "towns with few churches tend to have a small police force" and "towns with many churches tend to have a large police force" are correct.
Explanation:
It is given that both the “number of churches in a city” and “number of police stations in a city” are positively associated.
A positive association between two variables means that if one variable’s value increases, then the value of other variable also increases. A negative association between two variables means that if one variable’s value increases, then the value of other variable also decrease.
Thus, if the number of churches in a city increases, then the number of police stations also increases. Likewise, if the number of churches in a city decreases, then the number of police stations also decreases
Hence, option E is correct
