Answer:
The correct answer is D. Umbilical cord
Explanation:
The umbilical cord connects the fetus to the placenta and through it exchanges nutritional substances as well as oxygen-rich blood. The umbilical cord is maintained throughout gestation until the moment of birth, when it is cut and leaves a permanent scar, the navel. The umbilical cord is responsible for breathing and feeding the fetus until the moment it is born, so any failure or blockage in the circulation of oxygen and nutrients through the cord can lead to injury or even death of the embryo. It also serves to remove waste and carbon dioxide (CO2).
Answer:
All of them seems true tho
The
benefit of using a shortcut in a reaction between two chemicals is
that sings of a chemical change will still be found. We will still
get a new substance and its chemical and physical properties will
differ from those of the original substance.
I
hope it helps, Regards.
The hormone testosterone promotes sexual desires in both males and females
