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.
One of the main differences between sharks and other animals is that the males have claspers that they use to get the sperm into the females. Sharks have two claspers one on each side of their body. Broadly speaking, reproduction in sharks may be sexual or asexual depending on the species.