What structure does phylum Cnidaria have that no other phylum does?

In which direction is the pacific plate moving in relation to the north american plate?

What is the importance of having the us forest service, the bureau of land management, the us fish and wildlife service, and the national park service? to manage land resources for conservation and the development of natural resources to manage land resources for conservation and the development of urban areas to preserve historical landmarks and manage the development of urban areas to preserve historical landmarks and manage the development of rural areas

What type of graph presents information about how often certain or traits occur?