To help determine the cause of unexplained excessive or repeated episodes of bleeding, to diagnose von Willebrand disease (VWD), and to distinguish between different types of VWD.
The tropical zones of the American continent (Neotropics), where Costa Rica is located, contain a greater diversity of species and ecosystems, as well as a broader range of interactions, compared with other tropical regions of the world.he institution charged with the task of administering Costa Ricaâs biodiversity is the Ministry of the Environment and Energy (MINAE), and more specifically to the National System of Conservation Areas (SINAC), which is responsible for the conservation and sustainable use of the countryâs biodiversity.
The fundamental biostratigraphic unit is the biozone. The range zone is defined by the geologic range (the total time of existence) of a particular fossil group or species. For example the range zone of the fossil graptolites is Ordivician to Devonian. A concurrent range zone is the overlapping range zones of two or more fossils with different geologic ranges.