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The primary physiological cue for migration are the changes in the day length. These changes are also related to hormonal changes in the birds. In the period before migration, many birds display higher activity or Zugunruhe (German: migratory restlessness), first described by Johann Friedrich Naumann in 1795, as well as physiological changes such as increased fat deposition. The occurrence of Zugunruhe even in cage-raised birds with no environmental cues (e.g. shortening of day and falling temperature) has pointed to the role of circannual endogenous programs in controlling bird migrations. Caged birds display a preferential flight direction that corresponds with the migratory direction they would take in nature, changing their preferential direction at roughly the same time their wild conspecifics change course.
What do caged birds display that corresponds with migratory direction in nature?
A: preferential flight direction

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Efforts have been made to protect Guam's coral reef habitats from pollution, eroded silt and overfishing, problems that have led to decreased fish populations. (Since Guam is a significant vacation spot for scuba divers, this is important.) In recent years, the Department of Agriculture, Division of Aquatic and Wildlife Resources has established several new marine preserves where fish populations are monitored by biologists. Before adopting U.S. Environmental Protection Agency standards, portions of Tumon Bay were dredged by the hotel chains to provide a better experience for hotel guests. Tumon Bay has since been made into a preserve. A federal Guam National Wildlife Refuge in northern Guam protects the decimated sea turtle population in addition to a small colony of Mariana fruit bats.
What most endangered the Mariana fruit bats?
A: unanswerable

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In May 1778, Burke supported a parliamentary motion revising restrictions on Irish trade. His constituents, citizens of the great trading city of Bristol, however urged Burke to oppose free trade with Ireland. Burke resisted their protestations and said: "If, from this conduct, I shall forfeit their suffrages at an ensuing election, it will stand on record an example to future representatives of the Commons of England, that one man at least had dared to resist the desires of his constituents when his judgment assured him they were wrong".
What was Bristol's most important industry?
A: trading

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Although Brandenburg was a part of the Holy Roman Empire, the Prussian lands were not within the Holy Roman Empire and were with the administration by the Teutonic Order grandmasters under jurisdiction of the Emperor. In return for supporting Emperor Leopold I in the War of the Spanish Succession, Elector Frederick III was allowed to crown himself "King in Prussia" in 1701. The new kingdom ruled by the Hohenzollern dynasty became known as the Kingdom of Prussia. The designation "Kingdom of Prussia" was gradually applied to the various lands of Brandenburg-Prussia. To differentiate from the larger entity, the former Duchy of Prussia became known as Altpreuen ("Old Prussia"), the province of Prussia, or "East Prussia".
Who elected there self as King of Prussia in 1701?
A:
Frederick III