Which activity is an effective solution for keeping the oxygen cycle stable?
O
A. Dumping waste from ships into the ocean
B. Pruning trees in the backyards of homes
C. Raising more cows on farms
D. Replanting trees in deforested areas
SUBMIT

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