A person's blood type is based on the antigens found in the blood. These antigens, A and B are found on the surface of the blood cells and are uses as markers in the body. Type O blood does not have A or B antigens on the red blood cells, but contains both types in the plasma.
The Karst Plateau or the Karst region (Italian: Carso; Slovene: Kras), also simply known as the Karst, is a limestone plateau region extending across the border of southwestern Slovenia and northeastern Italy.he Karst Plateau or the Karst region (Italian: Carso; Slovene: Kras), also simply known as the Karst, is a limestone plateau region extending across the border of southwestern Slovenia and northeastern Italy.
Karst topography is a layer of limestone close to the surface that creates deep valleys, caverns, and sinkholes. In an area where this limestone near the surface, groundwater erosion can change the shape of the land. In these areas, streams are rare because water sinks into the limestone.roundwater is underground water that helps shape the land. When it rains not all rain water becomes runoff, it also can be soaked into the ground. Once the water is soaked up it fills in the cracks of soil and rock. Groundwater can sometimes cause erosion through processes of chemical weathering.