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).
Well the male bird is a dominant (long beak) and the female is a recessive(small beak.) we can assume that the female birds genotype is ii and the male birds genotype is LL or Li. When it comes to the offspring we can assume that the offspring would have a long beak. The offspring would either have the dominant (father) genes.
Spring is the mating season for a lot of animals. For dogs, though, they dont mainly want to mate in spring. An dog usually goes into heat every 6 months, so it could be in any season.
€< is a mentrial function therefore its atoms split.
answer: b
