Answer:
Airplanes
Explanation:
Commercial and Freight aviation has come a long way. From using out dated B-16 bombers for passengers we are now using beautiful technology like Boeing-747-400, Airbus A-380, and the massive and intimidating freighter AN-225. Imagine the fact that we come from a small 2 passenger glide with one propeller to Fighter Jets that can go more then 400 KM/H all over the world like the American F-18 or the American Stealth B-2 bomber. Commercial aviation also came a long way. Before we used B-16 airplanes that couldn't fly high up which caused turbulence and discomfort. The break thru in aviation was the first ever commercial airliner to break the Altitude of 43,000 feet was the Boeing 747-100.
Answer:
True
Explanation:
The National Origins Act was an act with which the United States set up lot of limitations about immigration. This act prevented the people from East Asia to migrate to the United States, as well as minimizing the number of immigrants from Southern and Eastern Europe. The main purpose behind this act was to retain the homogeneity of the population and preserve the culture. The people from north and western Europe were not in such a situation though, and even though the United States limited the number of immigrants that they will get annually, they were not discriminatory towards these people. This is why the majority of the immigrants in this period from the countries like Germany and the Scandinavian countries.
Answer:
Controlling purple loosestrife can be an exhausting and expensive process that may have limited success. Thus, the use of a biological control agent has been a handy tool to reduce the effort needed to considerably reduce the threat of purple loosestrife to our wetlands. Biological controls are animals, bacteria, fungus or viruses that are released into an infestation of an invasive species to consume or infect and kill the invasive species.
Biological controls must be thoroughly and extensively researched to ensure there are no secondary effects of the control, such as another species being killed by the control. Biological controls do not usually eradicate an invasive species, but they provide a level of control that can significantly reduce the species presence, making it either inconsequential or easier to control via other methods.
This blog will explore biological control, invasive species issues, and provide a step-by-step guide to how to responsibly raise and release Galerucella beetles for the control of purple loosestrife.
Sources:
PCA Alien Plant Working Group Invasive Species Profile
Purple Loosestrife (Lythrum salicaria)
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Yes, the Germans had to be stopped.
We should have went to war because we didn't want to get destroyed by the Germans, and plus we wanted to help the countries we were in alliance with. Also if we wouldn't have went to war, then the Germans would rule the U.S. just like how they pretty much ruled all of Europe.
Not America's fight
It's true that the German sank the Lusitania and sent the Zimmerman note to Mexico but entering World War 1 just made it worse because more Americans died. Also many soldiers were drafted into the war between the ages of 18 and 30 which meant they lost a lot of that generation. Also they should have stopped sending more supplies to the allied powers than the central powers.
Answer:
Theocentric culture that limited scientific development.
Explanation:
The culture of medieval Europe was a theocentric culture, where the Catholic religion had an exacerbated power over the freedoms of the population. Thus, most of the social norms were based on religious precepts, the kings had a direct link with the Pope and other hierarchs of the church, political power was seen as a detachment from divine power, and even knowledge, art and literature were controlled by ecclesiastical institutions.
It was only with the creation of the printing press and the development of the Renaissance that this theocentric culture was overthrown, giving way to a humanist period in which man came to occupy the center of importance in social development.
