The Lophophore. the Phoronida. The lophophore can most easily be described as a ring of tentacles, but it is often horseshoe-shaped or coiled. Phoronids have their lophophores in plain view, as shown above, but brachiopods like the one below must be opened wide in order to get a good view of their lophophore.
Definition. The effect of aggregate supply and demand in a market environment on the prices of goods and services. Market forces will cause prices to increase when supply decreases or demand increases, whereas prices will fall when demand decreases or supply increases.
economic forces. Factors such as level of employment, rate of inflation, rate of interest, demographic changes, and fiscal and monetary policies, which determine the state of competitive environment in which a firm operates. These forces affect the outcome of the firm's marketing activities, by determining the volume and strength of demand for the its products.