About how many galaxies are in our local group?
a. 4
b. 14
c. 40
d. 140

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.        

the last day of school because i didn’t have to go to school the next day

answer; identity theft;