Some are secondary consumers or second-order consumers, meaning that they eat primary consumers. Snakes that eat mice (primary consumers) are secondary consumers. Other higher-level consumers are tertiary consumers or third-order consumers, and eat further up on the food web or perhaps on many levels.Examples of third-order consumers are mountain lions and hawks, both of whom eat second-order consumers such as snakes and owls. food web differs from a food chain in that it includes all the organisms whose feeding habits are related in some way or another to those of other organisms. In the example above, small animals other than rabbits feed on lettuce and carrots and, in turn, those animals are fed upon by a variety of larger animals.
There are no quotas for persons into the U.S. seeking citizenship. The quotas are for Visas...in particular, Work visas AND Immigratn Visas. The status of legal permenent residence in the U.S. is a VISA class. Most people do not know this.
U.S. citizenship is not required for U.S.-based employment, but candidates must have the legal right to work in the United States. In most cases, IJM will not be able to assist financially in securing a visa to work in the United States.