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.
When the market is in equilibrium, there is no tendency for prices to change. We say the market clearing price has been achieved; A market occurs where buyers and sellers meet to exchange money for goods. The price mechanism refers to how supply and demand interact to set the market price and amount of goods sold; At most prices planned demand does not equal planned supply. This is a state of disequilibrium because there is either a shortage or surplus and firms have an incentive to change the price. Market equilibrium