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 Motivation. Heading. A basic principle of modern economics is that all economic behaviour is motivated by self-interest. Self-interest is a powerful motivator of economic activity, but it seems to be contrary to Christian morality. Capitalism has lifted economic well-being in an amazing way, but capitalistic economic theory seems to require people to pursue their self-interest exclusively.