Moving water: river, creek
standing water: pond, swamp
I think in macroeconomics this happens due to the presence of different opportunity costs. Opportunity cost. Opportunity cost is the benefit that an individual could have acquired, but gave up, to take another course of action. it represents an alternative given up when a decision is made.
Answer:
Gene flow is the exchange of alleles between two or more populations. For this reason it is sometimes referred to as allele flow or gene migration. While migrating animals often carry new alleles from one population to another, they must interbreed with the new population for gene flow to occur. In the image below, a beetle from a population of brown beetles migrates into a population of green beetles.
<span> fermentation process is starting. </span>
