In fetal life, the lungs are not expanded, so most of the blood from the right ventricle is shunted from the pulmonary artery to the aorta through the patent ductus arteriosus. With a few breaths the lungs expand, and blood flows from right ventricle to pulmonary artery into the lungs. Withdrawal of circulating prostaglandin from the mother plus bradykinins released from the expanding lung of the infant cause the ductus to close over a few minutes to hours. The closed ductus remains as the ligamentum arteriosum.
Your answer would be A. because its "parents" do not have any white flowers at all. The color of its flowers would be dark pink.
C.75 of the cell's mass is water
The answer is C. A catalyst speeds up the rate of a chemical reaction. However, it is not consumed during the course of the day.
Answer:
Our breath being absorbed by the atmosphere and dumped back down in the form of rain or snow
