During which stage of the cell cycle is the dna copied

When creating a graph, the goes on the x axis and the goes on the y axis. a. dependent variable, independent variable b. experimental group, control group c. independent variable, dependent variable d. control group, experimental group

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Blank is a rock with a find dark texture that makes up the oceanic crust