This is used to track traits within a family line.
a microscope
punnet square
a pedigree chart
a flow chart

2. which is the last step in the scientific method?

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.

Construct at least two possible hypotheses for the student’s experiment.