QUES: The Great Irish Famine brought a large influx of Irish immigrants. Over 200,000 were living in New York by 1860, upwards of a quarter of the city's population. There was also extensive immigration from the German provinces, where revolutions had disrupted societies, and Germans comprised another 25% of New York's population by 1860.
In 1860, what percentage of the city population was composed of German immigrants?

ANS: 25%

QUES: Birds have one of the most complex respiratory systems of all animal groups. Upon inhalation, 75% of the fresh air bypasses the lungs and flows directly into a posterior air sac which extends from the lungs and connects with air spaces in the bones and fills them with air. The other 25% of the air goes directly into the lungs. When the bird exhales, the used air flows out of the lung and the stored fresh air from the posterior air sac is simultaneously forced into the lungs. Thus, a bird's lungs receive a constant supply of fresh air during both inhalation and exhalation. Sound production is achieved using the syrinx, a muscular chamber incorporating multiple tympanic membranes which diverges from the lower end of the trachea; the trachea being elongated in some species, increasing the volume of vocalizations and the perception of the bird's size.
Where does the other 25 percent of fresh air go?

ANS: directly into the lungs

QUES: Research on emotion has increased significantly over the past two decades with many fields contributing including psychology, neuroscience, endocrinology, medicine, history, sociology, and even computer science. The numerous theories that attempt to explain the origin, neurobiology, experience, and function of emotions have only fostered more intense research on this topic. Current areas of research in the concept of emotion include the development of materials that stimulate and elicit emotion. In addition PET scans and fMRI scans help study the affective processes in the brain. It also is influenced by hormones and neurotransmitters such as dopamine, noradrenaline, serotonin, oxytocin, cortisol and GABA.
Besides dopamine, noradrenaline, serotonin, cortisol and oxytocin, what neurotransmitter or hormone do not influence emotion?

ANS: unanswerable

QUES: Johnson's impeachment was perceived to have done great damage to the presidency, which came to be almost subordinate to Congress. Some believed that the president would become a mere figurehead, with the Speaker of the House of Representatives becoming a de facto Prime Minister. Grover Cleveland, the first Democratic President following Johnson, attempted to restore the power of his office. During his first term, he vetoed over four hundred billstwice as many bills as his twenty-one predecessors combined. He also began to suspend bureaucrats who were appointed as a result of the patronage system, replacing them with more "deserving" individuals. The Senate, however, refused to confirm many new nominations, instead demanding that Cleveland turn over the confidential records relating to the suspensions. Cleveland steadfastly refused, asserting, "These suspensions are my executive acts ... I am not responsible to the Senate, and I am unwilling to submit my actions to them for judgment." Cleveland's popular support forced the Senate to back down and confirm the nominees. Furthermore, Congress finally repealed the controversial Tenure of Office Act that had been passed during the Johnson Administration. Overall, this meant that Cleveland's Administration marked the end of presidential subordination.
Under which President was the Tenure of Office Act repealed?

ANS:
Grover Cleveland