I'm not really sure, but I guess skin colour isn't passed genetically?
The answer is: 25
Explanation:
#25 is the atomic number for Manganese (Mn).
Answer
C) Viruses need a host to survive
The answer should be B). Helpful traits passed to the next generation through reproduction.
B is correct because in natural selection, if a population cannot adapt over time it will be “naturally selected” and die off, or be near extinction due to non-adaptive ness. Hope this helped!
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.
