Describe ddt and summarize the history of the use and banning of ddt, including actions taken by the u. s. government. state the major reasons for spraying with ddt and for banning it. state three or more ways science has played a role in the controversy.

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