Graphing and analyzing scientific data

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.