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:
A. Use a greater number of plants
Explanation:
Continental plate moving on the sea floor.
The answer would be <span>no definite shape or definite volume.</span>
Answer:
kinetic energy
Explanation:
if something is moving that means its kinetic if its still its potential
