Answer:
I am pretty sure.. it's option B.
COBALT.
I think the correct answer would be A. The yolk sac becomes the placenta. It is membranous sac that is attached to the embryo. It provides all the nutrition and the blood cells needed by the embryo. It is also called the umbilical vesicle.
Answer:
UUCCCU
Explanation:
If you are translating into RNA, Adenine goes with Uracil and Guanine pairs up with Cytosine.