What are these examples of

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

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

Me the formula cacl2 represents the compound