Cells that make up the outer covering on a plant are found in

18. over time, how do sand dunes tend to migrate? a. perpendicular to the movement of the wind b. in the same direction as the wind blows c. toward the wind d. in random directions

Which kind of mutation has occurred when the codon for an amino acid is changed to a stop codon? a. a silent mutation b. a missense mutation c. a frameshift mutation d. a nonsense mutation

Collin would like to use the data a coworker has entered in a database. the problem is the coworker's database software is different from collin's. collin should