Which of these is likely to happen in the absence of the stratosphere? O We may have to bear the impact of a meteorite.

O We may not experience storms, winds, and clouds.

O Mixing of air due to convection currents may stop.

Increased exposure to radiation may cause skin ailments.

How does the closing of the ductus arteriosus and ductus venosus alter circulation in an infant? a. increases blood flow to the pulmonary artery and increases blood flow to the umbilical vein b. increases blood flow to the pulmonary artery and reduces blood flow to the umbilical vein c. reduces blood flow to the pulmonary vein and increases blood flow to the umbilical artery d. reduces blood flow to the pulmonary vein and reduces blood flow to the umbilical artery