Answer:
The water quality is deteriorated as there is depletion in Oxygen O₂.
Yes, the activity of the yeast has precluded the usage of the water
Explanation:
Here, we note that the addition of more or fewer drops of Reagent D sodium hydroxide (NaOH) is required to get the same blue color as in Phase 1 where no yeast is added indicates the level of O₂ in the water as the amount of O₂ concentration in the solution is directly proportional to the amount of Reagent D required to reach blue, meaning the O₂ is depleted.
When less sodium hydroxide is required to turn blue we have depleted sodium hydroxide in the solution that is the yeast added in Phases 2 or 3 of the experiment, consume O₂
Eutrophication is the enrichment of a body of water with nutrients that results in a change in the ecosystem such as: algae production, oxygen depletion and other results that diminishes the water usage.
Answer:
friends
Explanation:
because they are those person who can spoil ur whole life
Free blacks in the antebellum period—those years from the formation of the Union until the Civil War—were quite outspoken about the injustice of slavery. Their ability to express themselves, however, was determined by whether they lived in the North or the South. Free Southern blacks continued to live under the shadow of slavery, unable to travel or assemble as freely as those in the North. It was also more difficult for them to organize and sustain churches, schools, or fraternal orders such as the Masons.
Although their lives were circumscribed by numerous discriminatory laws even in the colonial period, freed African Americans, especially in the North, were active participants in American society. Black men enlisted as soldiers and fought in the American Revolution and the War of 1812. Some owned land, homes, businesses, and paid taxes. In some Northern cities, for brief periods of time, black property owners voted. A very small number of free blacks owned slaves. The slaves that most free blacks purchased were relatives whom they later manumitted. A few free blacks also owned slave holding plantations in Louisiana, Virginia, and South Carolina.
Free African American Christians founded their own churches which became the hub of the economic, social, and intellectual lives of blacks in many areas of the fledgling nation. Blacks were also outspoken in print. Freedom's Journal, the first black-owned newspaper
Boston Massacre forced the French to give up their claim in Canada and Spain was forced to give up Florida.
