Ahmad dan Aini ialah kembar tak seiras.
Ibunya mendapati kadar denyutan nadi Aini lebih tinggi berbanding Ahmad ketika mereka sedang berehat. Apakah faktor yang mempengaruhi kadar denyutan nadi mereka berdua?
Ahmad and Aini are non-identical twins.
Their mother found that Aini's pulse rate was higher than Ahmad's when they were resting. What is the factor that affects the pulse rate for both of them?