Blood from the lungs is carried back to the heart by which of the following:
inferior vena cava
pulmonary vein
pulmonary artery
superior vena cava

What fraction of high school seniors in the united states admit to drinking alcohol

What is the difference between a joint and a fault? a)a joint is formed by confining pressure. b)a joint is formed by differential stress but a fault is not. c)a fault is formed by tension but a joint is formed by compression. d)a fault displaces the rocks on one side relative to another.

True or false a fertilized cell divides many times to form an embryo