Evolutionary history of plants seed model is shared by basically all gymnosperms (literally: "naked seeds"), most of which encase their seeds in a woody cone or fleshy aril (the yew, for example), but none of which fully enclose their seeds. The angiosperms ("vessel seeds") are the only group to fully enclose the seed, in a carpel. Fully enclosed seeds opened up a new pathway for plants to follow: that of seed dormancy. The embryo, completely isolated from the external atmosphere and hence protected from desiccation, could survive some years of drought before germinating. Gymnosperm seeds from the Late Carboniferous have been found to contain
Scope of practice assistant, nurses, dietitians, respiratory therapists, physical therapists, occupational therapists and dentists among many others. Governing, licensing, and law enforcement bodies are often at the sub-national (e.g. state or province) level, but federal guidelines / regulations also often exist. For example, in the United States, the National Highway Traffic Safety Administration in the Department of Transportation has a national scope of practice for emergency medical services. Scope of practice The scope of practice describes the procedures, actions, and processes that a healthcare practitioner is permitted to undertake in keeping with the terms of their professional license. The scope of practice is