Article: In an ecosystem, predation is a biological interaction where a predator (an organism that is hunting) feeds on its prey (the organism that is attacked). Predators may or may not kill their prey prior to feeding on them, but the act of predation often results in the death of the prey and the eventual absorption of the prey's tissue through consumption. Thus predation is often, though not always, carnivory. Other categories of consumption are herbivory (eating parts of plants), fungivory (eating parts of fungi), and detritivory (the consumption of dead organic material (detritus)). All these consumption categories fall under the rubric of consumer-resource systems. It can often be difficult to separate various types of feeding behaviors. For example, some parasitic species prey on a host organism and then lay their eggs on it for their offspring to feed on it while it continues to live in or on its decaying corpse after it has died. The key characteristic of predation however is the predator's direct impact on the prey population. On the other hand, detritivores simply eat dead organic material arising from the decay of dead individuals and have no direct impact on the "donor" organism(s).

Question: What is the key characteristic of predation?
Ans: predator's direct impact on the prey population

Article: After 92 AD, the palace eunuchs increasingly involved themselves in court politics, engaging in violent power struggles between the various consort clans of the empresses and empress dowagers, causing the Han's ultimate downfall. Imperial authority was also seriously challenged by large Daoist religious societies which instigated the Yellow Turban Rebellion and the Five Pecks of Rice Rebellion. Following the death of Emperor Ling (r. 168189 AD), the palace eunuchs suffered wholesale massacre by military officers, allowing members of the aristocracy and military governors to become warlords and divide the empire. When Cao Pi, King of Wei, usurped the throne from Emperor Xian, the Han dynasty ceased to exist.

Question: Which King took the seat of power from Emperor Xian?
Ans: Cao Pi

Article: Many causes for the financial crisis have been suggested, with varying weight assigned by experts. The U.S. Senate's LevinCoburn Report concluded that the crisis was the result of "high risk, complex financial products; undisclosed conflicts of interest; the failure of regulators, the credit rating agencies, and the market itself to rein in the excesses of Wall Street." The Financial Crisis Inquiry Commission concluded that the financial crisis was avoidable and was caused by "widespread failures in financial regulation and supervision", "dramatic failures of corporate governance and risk management at many systemically important financial institutions", "a combination of excessive borrowing, risky investments, and lack of transparency" by financial institutions, ill preparation and inconsistent action by government that "added to the uncertainty and panic", a "systemic breakdown in accountability and ethics", "collapsing mortgage-lending standards and the mortgage securitization pipeline", deregulation of over-the-counter derivatives, especially credit default swaps, and "the failures of credit rating agencies" to correctly price risk. The 1999 repeal of the Glass-Steagall Act effectively removed the separation between investment banks and depository banks in the United States. Critics argued that credit rating agencies and investors failed to accurately price the risk involved with mortgage-related financial products, and that governments did not adjust their regulatory practices to address 21st-century financial markets. Research into the causes of the financial crisis has also focused on the role of interest rate spreads.

Question: What is the name of the U.S. Senate report giving their conclusions for the cause of the crisis?
Ans: LevinCoburn Report

Article: In 1899, the local postage stamps were overprinted "Guam" as was done for the other former Spanish colonies, but this was discontinued shortly thereafter and regular U.S. postage stamps have been used ever since. Because Guam is also part of the U.S. Postal System (postal abbreviation: GU, ZIP code range: 9691096932), mail to Guam from the U.S. mainland is considered domestic and no additional charges are required. Private shipping companies, such as FedEx, UPS, and DHL, however, have no obligation to do so, and do not regard Guam as domestic.

Question: In what year was the local postage stamp overprinted and has since been replaced?
Ans:
1899