Symbiosis describes close interactions between two or more different species. There are four main types of symbiotic relationships: mutualism, commensalism, parasitism and competition. Symbiotic relationships are important because they are a major driving force of evolution.
Border Security. Exporters. Definition. For C-TPAT purposes, an exporter is defined as: A person or company who, as the principal party in interest in the export transaction, has the power and responsibility for determining and controlling the sending of the items out of the United States.
Imports and exports. AâtoâZ. 1  Business support on the phone and online. 2  Classify imports and exports using the UK Trade Tariff. 3  Duty relief for imports and exports. 4  Excise Movement and Control System (EMCS). 5  Export agents for international trade. 6  Finding commodity codes for import and export duty.âtoâZ. 1  Business support on the phone and online. 2  Classify imports and exports using the UK Trade Tariff. 3  Duty relief for imports and exports. 4  Excise Movement and Control System (EMCS).