Answer:
Conflict theory
Explanation:
Conflict theory: The conflict theory is given by Karl Marx and is considered to be the father of this theory.
The theory describes that the society is in a perceptual conflict condition due to the competition among people for limited resources. He believes that the preservation of social order is done through power and domination, instead of conformity and consensus.
The Conflict theorists believed that society holds an arena of inequality that creates social change and social conflict.
Example: Conflict theory can be used in violence, and wars, etc by defining the natural disparity in a given society that creates these problems.
Social conflict theory is the sociological perspective that best fit Jeff’s views.
Answer:
<u>To explain the bonds of injustice.</u>
Explanation:
He states in the passage that even though President Lincoln freed the slaves, the "bonds of injustice" are still present. He states how economic and social oppression are still going on, so this means that not all citizens are free. The injustice is still after the slaves supposedly are freed.
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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