What is an effector strain of bacteria

If you mix chlorine lithium and nickel together which two elements would be the most reactive

When does your body conduct current more readily?

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve