Answer:
First, the zygote becomes a solid ball of cells. Then it becomes a hollow ball of cells called a blastocyst. Inside the uterus, the blastocyst implants in the wall of the uterus, where it develops into an embryo attached to a placenta and surrounded by fluid-filled membranes.
When the M phase begins during the cell cycle, it starts with prophase
<span>D: Viruses
I hope helped ^-^</span>
Answer:
Is there more to the question? I'm not sure what this would be.
