I don't see the Venn Diagram but in Cellular respiration there are 3 Cycles. Glycolysis, Krebs Cycle, and ETC (Electron Transport Chain) Glycolysis does NOT require Oxygen (Anaerobic) and Krebs and ETC require Oxygen (Aerobic). Hope this helps!
Polygenic dominates because it would be masked
Answer:
B. left atrium and C. left ventricle