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.
In a free market economy, the âinvisible handâ of supply-and-demand market forces defines what is produced, in what quantity, and at what price. A market economy is a type of economic system in which the trading and exchange of goods, services and information takes place in a free market.usinesses can decide which goods to produce and in what quantity, and consumers and businesses can decide what they want to purchase and at what price. The opposite of a market economy is a planned economy, where the government decides what to produce, in what quantity, and to be sold at what price.