Our analysis of production and cost begins with a period economists call the short. run. Theshort run in this microeconomic context is a planning period over which the. managers of a firm must consider one or more of their factors of production as fixed.
Sharks have two sets of paired fins on the sides of their body, in the same general position as the main wings and horizontal tail wings of a plane. The shark can position these fins at different angles, changing the path of the water moving around them.
Many shark species, such as the goblin shark and sand tiger, have very long, thin teeth. This structure is well suited for catching small fish. The shark kills the fish immediately, by piercing it with a single bite. Then it swallows the fish whole. Sharks that go after larger prey need a different strategy and a different sort of tooth. They tear into their prey several times, biting off large pieces of flesh. Sharks in this group, which includes the infamous great white shark, have wide serrated teeth.