How does pulse rate connect to cellular respiration ?

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen

Moving down the ramp from 6 meters to