Which of the following statements best describes how science has developed over time?
A. Until 50 years ago, only men made contributions to scientific
knowledge. B. All useful scientific knowledge has been developed within the past
100 years.
C. Worldwide, scientists work independently to build the scientific
knowledge within their own countries.
D. Men and women all over the world have investigated scientific
questions throughout history.

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