Problem: Question: "Who served as a personal escort?" Context: "When he became First Consul and later Emperor, Napoleon eschewed his general's uniform and habitually wore the simple green colonel uniform (non-Hussar) of a colonel of the Chasseur a Cheval of the Imperial Guard, the regiment that often served as his personal escort, with a large bicorne. He also habitually wore (usually on Sundays) the blue uniform of a colonel of the Imperial Guard Foot Grenadiers (blue with white facings and red cuffs). He also wore his Legion d'honneur star, medal and ribbon, and the Order of the Iron Crown decorations, white French-style culottes and white stockings. This was in contrast to the gorgeous and complex uniforms with many decorations of his marshals and those around him." Answer:

A: the Imperial Guard

Problem: Question: "What were the average temperatures compared to today?" Context: "The climate of the Cretaceous is less certain and more widely disputed. Higher levels of carbon dioxide in the atmosphere are thought to have caused the world temperature gradient from north to south to become almost flat: temperatures were about the same across the planet. Average temperatures were also higher than today by about 10C. In fact, by the middle Cretaceous, equatorial ocean waters (perhaps as warm as 20 C in the deep ocean) may have been too warm for sea life,[dubious discuss][citation needed] and land areas near the equator may have been deserts despite their proximity to water. The circulation of oxygen to the deep ocean may also have been disrupted.[dubious discuss] For this reason, large volumes of organic matter that was unable to decompose accumulated, eventually being deposited as "black shale"." Answer:

A: higher than today by about 10C

Problem: Question: "Because of an alteration in what might a bird decide that it is time to migrate?" Context: "The timing of migration seems to be controlled primarily by changes in day length. Migrating birds navigate using celestial cues from the sun and stars, the earth's magnetic field, and probably also mental maps." Answer:

A: day length

Problem: Question: "How is the protector god displayed in Troy?" Context: "Homer pictures Apollo on the side of the Trojans, fighting against the Achaeans, during the Trojan War. He is pictured as a terrible god, less trusted by the Greeks than other gods. The god seems to be related to Appaliunas, a tutelary god of Wilusa (Troy) in Asia Minor, but the word is not complete. The stones found in front of the gates of Homeric Troy were the symbols of Apollo. The Greeks gave to him the name agyieus as the protector god of public places and houses who wards off evil, and his symbol was a tapered stone or column. However, while usually Greek festivals were celebrated at the full moon, all the feasts of Apollo were celebrated at the seventh day of the month, and the emphasis given to that day (sibutu) indicates a Babylonian origin." Answer:

A:
tapered stone or column