What does it mean to say that cells are specialized

Which plains area lies in both the united states and canada? altiplano central canadian shield coastal plains great plains

What word is used to describe differences of individual organisms

How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u. s. fish and wildlife service