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stich3 [128]
1 year ago
5

Who was the first african american to become president.

Social Studies
2 answers:
Brrunno [24]1 year ago
4 0

Answer:

Barack Obama

Explanation:

Was the first African American and first biracial president of the United States, being elected in the 2008 election and re-elected in the 2012 election.

Nata [24]1 year ago
3 0

Answer:

George Washington

Explanation:

he is the first american!

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Not everyone can live like an upper class white man. They posses privaleges  and live in a different mindset compared to for example a lower class woman or a man of color. Therefore you cannot compare a white middle class mans mental state as opposed to many other different peoples.

Explanation:

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Is protecting allied countries from terrorism within the mission of the Homeland Security?
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What is the Cambodian genocide
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If you subcultured a microbial colony by transferring some of the cells into a tube of sterile nutrient broth, would the new cul
podryga [215]

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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.

Learn more about subcultured at

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1 year ago
Sabrina and bethany are both members of the same crowd in high school. What does this mean?
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Sabrina and Bethany are both associates of the same crowd in high school, which suggests that. They communicate interests, attitudes, behaviors, and appearance characteristics. Participation in after-school activities funded by the school or community organizations is positively related to educational achievement.

<h3>What balance of American parents reports strong feelings of powerlessness rejection and personal guilt when their children become adolescents?</h3>

Approximately 40% proportion of American parents reports powerful sensations of powerlessness, self-denial, and individual guilt when their children evolve adolescents.Some parents of adolescents are proceeding through their own "perilous metamorphosis."

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