In research methodology, the words proposition and hypothesis are often confused, and are often used with slightly different shades of meaning by different authors. However, the most popular view is that based on the existing literature in a field, a theory is built.
14 Where they live On a global scale, the sea eagle extends across the northern hemisphere from Siberia and Japan to Europe, and south to the Mediterranean and the Middle East. It is replaced by the bald eagle in North America, although it is the sea eagle that has colonised the southwest coast of Greenland.
Common sea stars live in the North Atlantic Ocean along the coasts of Canada, the Northeastern United States, Europe and the northern coast of Africa. Common sea stars are found along rocky shores in intertidal areas, and deeper waters out to about 2000 feet.iet and Feeding. Common sea stars eat mollusks, including bivalves (a favorite prey item is the blue mussel) and gastropods. They also eat crustaceans and worms. They act both as active predators and scavengers.