Why can a specific signal elicit a different response or no response at all from different cell types?

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 is the one part of the nucleotide  that differs among the other different nucle  tides?

Which of these is an example of structural protein in plants