A plant that has a taproot system and has several growth rings and that is evident by the cross-section of the stem and has a layer that is a type of bark and is referred to as an angiosperm.
It has about three to four parts of multiple vascular rings and columns in the stems.
-cantidad de muertes anuales (causas naturales) -cantidad de muertes anuales (causas no naturales) -cantidad de inmigrantes anuales -cantidad de emigrantes anuales
