What is the study of the history of tree rings called?

"the importance of the japanese economy and security is far greater than that of the asian values"

answer; by working independently, the states have a high likelihood of developing innovative solutions that can be employed in other states;

answer; ///(c) i believe that the correct answer is ethnic relations bear many similarities across different global; good luck

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.